OEIS

Papers: List Papers; (with Abstracts); Curriculum (in Italian): long version ; short version); Google Scholar profile. ResearchGate page. Orcid ID. Scopus Author ID. Thomson Reuters Researcher ID, Mathematical Reviews page.

## 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:
 A000466: a(n) = 4*n^2 - 1.
 A002375: From Goldbach conjecture: number of decompositions of 2n into an unordered sum of two odd primes.
 A064533: Decimal expansion of Landau-Ramanujan constant.
 A073010: Decimal expansion of Pi/sqrt(27).
 A135311: A greedy sequence of prime offsets.
 A161529: Decimal expansion of negative of constant M(3,1) arising in Mertens and Meissel-Mertens constants for sums over arithmetic progressions.
 A187549: Arises in a Diophantine problem with one prime, two squares of primes and s powers of two.
 A227158: Second-order term in the asymptotic expansion of B(x), the count of numbers up to x which are the sum of two squares.
 A309520: Primes p for which h1(p)/G(p) has a record value.
 A335576: Decimal expansion of Mertens constant C(5,2).
 A336798: Decimal expansion of Mertens constant C(5,3).
 A336802: Decimal expansion of the constant Π(5,1).
 A338462: Decimal expansion of the constant Π(5,4).
 A340127: Decimal expansion of Product_{p ≡ 4 (mod 5)} p^2/(p^2-1).
 A340628: Decimal expansion of Product_{p ≡ 4 (mod 5)} (p^2+1)/(p^2-1).
 A340629: Decimal expansion of Product_{p ≡ 1 (mod 5)} (p^2+1)/(p^2-1).
 A340711: Decimal expansion of Product_{p ≡ 3 (mod 5)} (p^2+1)/(p^2-1).
 A340839: Decimal expansion of Mertens' constant C(5,1).
 A340866: Decimal expansion of Mertens' constant C(5,4).

Ultimo aggiornamento: 13.10.2021: 13:48:44

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