A347407 Decimal expansion of Sum_{i>=1} of i/Pi^i.

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

Offset

0,1

Links

Table of n, a(n) for n=0..85.

Formula

Equals Pi/(Pi-1)^2. - Vaclav Kotesovec, Aug 30 2021

Equals 1/(A098801 - 2). - Amiram Eldar, Aug 30 2021

Example

0.684977231531558172713446096930765618100063823640134883981...

Mathematica

RealDigits[Pi/(Pi - 1)^2, 10, 100][[1]] (* Amiram Eldar, Aug 30 2021 *)

Prog

(PARI) suminf(i=1, i/Pi^i) \\ Michel Marcus, Aug 30 2021

Crossrefs

Cf. A000796, A098801.

Sequence in context: A171784 A200133 A021150 * A065166 A006255 A110760

Adjacent sequences: A347404 A347405 A347406 * A347408 A347409 A347410

Keyword

nonn,cons

Author

Christoph B. Kassir, Aug 30 2021

Status

approved