A346436 - OEIS

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A346436

Decimal expansion of the constant Sum_{k>=0} (-1)^k/(8*k)!.

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

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OFFSET

0,1

LINKS

Table of n, a(n) for n=0..86.

Michael I. Shamos, A catalog of the real numbers (2011).

EXAMPLE

0.9999751984127462074717349605281...

MATHEMATICA

RealDigits[HypergeometricPFQ[{}, {1/8, 1/4, 3/8, 1/2, 5/8, 3/4, 7/8}, -1/2^24], 10, 120][[1]] (* Amiram Eldar, Jun 04 2023 *)

PROG

(PARI) sumalt(k=0, (-1)^k/(8*k)!) \\ Michel Marcus, Jul 18 2021