cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A365959 Decimal expansion of Sum_{k>=2} zeta(k)/k^2.

Original entry on oeis.org

8, 3, 5, 9, 9, 8, 3, 3, 2, 7, 0, 0, 9, 6, 4, 3, 2, 2, 9, 7, 0, 9, 1, 1, 1, 9, 8, 6, 9, 6, 0, 2, 9, 0, 9, 6, 4, 2, 7, 0, 4, 2, 1, 6, 8, 0, 9, 3, 2, 3, 3, 2, 4, 8, 3, 2, 9, 5, 5, 6, 3, 4, 9, 2, 5, 7, 7, 0, 1, 8, 9, 5, 2, 5, 3, 1, 7, 3, 8, 8, 4, 0, 0, 2, 1, 9, 2, 2, 7, 6, 8, 8, 7, 7, 6, 6, 2, 2, 3, 2, 5, 7, 7, 8, 5, 5
Offset: 0

Views

Author

Vaclav Kotesovec, Sep 23 2023

Keywords

Examples

			0.835998332700964322970911198696029096427042168093233248329556349257701895253...
		

Crossrefs

Programs

  • PARI
    sumpos(k=2,zeta(k)/k^2)

Formula

Equals Sum_{k>=1} (polylog(2, 1/k) - 1/k).
From Velin Yanev, Jul 30 2025: (Start)
Equals Integral_{x=0..1} log(Gamma(1 - x))/x dx - A001620. [Proved by Paul Enta, 2020]
Conjecture: Equals 2 - A001620 - Pi^2/12 + Integral_{x=0..oo} (2*x*arccot(x) - log(1/x^2 + 1))*log(1 - exp(-2*Pi*x))/(2*Pi*(x^2 + 1)) dx. (End)