A371499 Decimal expansion of Sum_{k>=0} 1/(k^2)!.

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

Offset

0,1

Links

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

Formula

(This constant) - (constant in A371498) = 2.00000551146384...

Example

2.04166942239863686002905586072...

Mathematica

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

Prog

(PARI) suminf(k=0, 1/(k^2)!) \\ Hugo Pfoertner, Mar 30 2024

Crossrefs

Cf. A371498.

Sequence in context: A008797 A239004 A168036 * A217930 A305371 A355018

Adjacent sequences: A371496 A371497 A371498 * A371500 A371501 A371502

Keyword

nonn,cons

Author

Clark Kimberling, Mar 30 2024

Status

approved