A371504 - OEIS

A371504

Decimal expansion of Sum_{k>=0} (-1)^k / (k^2 - k + 1)!.

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

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OFFSET

0,2

LINKS

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

FORMULA

Equals 1 - A371502. - Hugo Pfoertner, Apr 17 2024

EXAMPLE

0.166468254128844406602611458899...

MATHEMATICA

s = N[Sum[(-1)^k/((k^2 - k + 1)!), {k, 0, Infinity}], 120]

First[RealDigits[s]]