A118858 Decimal expansion of log(2)/Pi^2.

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

Offset

0,2

Links

Table of n, a(n) for n=0..104.

Derrick Norman Lehmer, Asymptotic Evaluation of Certain Totient Sums, American Journal of Mathematics, Vol. 22, No. 4 (1900), pp. 293-335.

Eric Weisstein's World of Mathematics, Primitive Pythagorean Triple.

Formula

Equals lim_{n->oo} A328499(n)/n. - Amiram Eldar, Jun 25 2021

Equals Integral_{z>=0} z*sech(Pi*z)^2. - Peter Luschny, Aug 03 2021

Example

0.07023049277268287640...

Mathematica

RealDigits[Log[2]/Pi^2, 10, 100][[1]] (* Amiram Eldar, Jun 25 2021 *)

Prog

(PARI) log(2)/Pi^2 \\ Michel Marcus, Jun 25 2021

Crossrefs

Cf. A249750, A328499, A002162, A002388, A284983.

Sequence in context: A287697 A335953 A227958 * A261167 A197014 A244979

Adjacent sequences: A118855 A118856 A118857 * A118859 A118860 A118861

Keyword

nonn,cons,easy

Author

Eric W. Weisstein, May 02 2006

Status

approved