Alessandro Languasco

Home

Research

Divulgazione

Programs

Books

OEIS

Teaching2122

Links

Teaching2021

Teaching1920

Alessandro Languasco


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:
[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] A064533: Decimal expansion of Landau-Ramanujan constant.
[4] A073010: Decimal expansion of Pi/sqrt(27).
[5] A135311: A greedy sequence of prime offsets.
[6] A161529: Decimal expansion of negative of constant M(3,1) arising in Mertens and Meissel-Mertens constants for sums over arithmetic progressions.
[7] A187549: Arises in a Diophantine problem with one prime, two squares of primes and s powers of two.
[8] 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.
[9] A309520: Primes p for which h1(p)/G(p) has a record value.
[10] A335576: Decimal expansion of Mertens constant C(5,2).
[11] A336798: Decimal expansion of Mertens constant C(5,3).
[12] A336802: Decimal expansion of the constant Π(5,1).
[13] A338462: Decimal expansion of the constant Π(5,4).
[14] A340127: Decimal expansion of Product_{p ≡ 4 (mod 5)} p^2/(p^2-1).
[15] A340628: Decimal expansion of Product_{p ≡ 4 (mod 5)} (p^2+1)/(p^2-1).
[16] A340629: Decimal expansion of Product_{p ≡ 1 (mod 5)} (p^2+1)/(p^2-1).
[17] A340711: Decimal expansion of Product_{p ≡ 3 (mod 5)} (p^2+1)/(p^2-1).
[18] A340839: Decimal expansion of Mertens' constant C(5,1).
[19] A340866: Decimal expansion of Mertens' constant C(5,4).



Ultimo aggiornamento: 13.10.2021: 13:48:44

Go to the
Maths Department
Home Page

Home

Research

Divulgazione

Programs

Books

OEIS

Teaching2122

Links

Teaching2021

Teaching1920

© Alessandro Languasco 2021