A371503 Decimal expansion of Sum_{k>=0} 1/(k^2 + k + 1)!.

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

Offset

0,3

Links

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

Formula

(this constant) - (constant in A371502) = 0.33333333365451421006976562532...

Example

1.16686507952566980346715416642...

Mathematica

s=Sum[1/((n^2 + n + 1)!), {n, 0, Infinity}]; First[RealDigits[N[s, 100]]]

Crossrefs

Cf. A371502.

Sequence in context: A205863 A132711 A021861 * A334365 A088684 A088683

Adjacent sequences: A371500 A371501 A371502 * A371504 A371505 A371506

Keyword

nonn,cons

Author

Clark Kimberling, Apr 04 2024

Status

approved