Alessandro Languasco

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Alessandro Languasco


Papers: List Papers; (with Abstracts); Curriculum (in Italian): long version ; short version; in English: long version. Google Scholar profile. ResearchGate page. Orcid ID. Scopus Author ID. Web of Science Researcher ID, Mathematical Reviews page, Zentralblatt page, IRIS-CINECA bibliometric parameters (italian ASN) [2023]. English C1 badge.


Online Encyclopedia of Integer sequences (referring to my contributions)


The OEIS (The On-Line Encyclopedia of Integer Sequences), founded in 1964 by N.J.A. Sloane, contains a large number of data about integer sequences; for a detailed descriptions of its aims see their Welcome page. Some research contributions of mine were inserted in the encyclopedia. They are listed here:
Sequences containing a contribution by A. Languasco.
So far they are the sequences:
  1. A000466: a(n) = 4*n^2 - 1.
  2. A002375: From Goldbach conjecture: number of decompositions of 2n into an unordered sum of two odd primes.
  3. A014549: Decimal expansion of 1 / M(1,sqrt(2)) (Gauss's constant).
  4. A064533: Decimal expansion of Landau-Ramanujan constant.
  5. A073005: Decimal expansion of Gamma(1/3).
  6. A073010: Decimal expansion of Pi/sqrt(27).
  7. A135311: A greedy sequence of prime offsets.
  8. A161529: Decimal expansion of negative of constant M(3,1) arising in Mertens and Meissel-Mertens constants for sums over arithmetic progressions.
  9. A187549: Arises in a Diophantine problem with one prime, two squares of primes and s powers of two.
  10. A242013: Decimal expansion of the Euler-Kronecker constant (as named by P. Moree) for hypotenuse numbers.
  11. A242015: Decimal expansion of the Euler-Kronecker constant (as named by P. Moree) for non-hypotenuse numbers.
  12. A227158: Second-order term in the asymptotic expansion of B(x), the count o f numbers up to x which are the sum of two squares.
  13. A301430: Decimal expansion of an analog of the Landau-Ramanujan constant for Loeschian numbers which are sums of two squares.
  14. A309520: Primes p for which h1(p)/G(p) has a record value.
  15. A335576: Decimal expansion of Mertens constant C(5,2).
  16. A336798: Decimal expansion of Mertens constant C(5,3).
  17. A336802: Decimal expansion of the constant Π(5,1).
  18. A338462: Decimal expansion of the constant Π(5,4).
  19. A340127: Decimal expansion of Product_{p ≡ 4 (mod 5)} p^2/(p^2-1).
  20. A340628: Decimal expansion of Product_{p ≡ 4 (mod 5)} (p^2+1)/(p^2-1).
  21. A340629: Decimal expansion of Product_{p ≡ 1 (mod 5)} (p^2+1)/(p^2-1).
  22. A340711: Decimal expansion of Product_{p ≡ 3 (mod 5)} (p^2+1)/(p^2-1).
  23. A340839: Decimal expansion of Mertens' constant C(5,1).
  24. A340866: Decimal expansion of Mertens' constant C(5,4).
  25. A350763: Decimal expansion of γ + log(2), where γ is Euler's constant;
  26. A368644: Decimal expansion of the Mertens constant M(3,2) arising in the formula for the sum of reciprocals of primes p == 2 (mod 3).
  27. A368645: Decimal expansion of the Mertens constant M(4,1) arising in the formula for the sum of reciprocals of primes p == 1 (mod 4) (negated).
  28. A368646: Decimal expansion of the Mertens constant M(4,3) arising in the formula for the sum of reciprocals of primes p == 1 (mod 4).



Ultimo aggiornamento: 04.07.2024: 15:05:55

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