A261114 Decimal expansion of Sum_{n>=0} 1/((n!)^n).

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

Offset

1,1

Links

Table of n, a(n) for n = 1..440

Example

2.2546326437516075174660917619423624873602862427910816970143008652092...

Mathematica

RealDigits[N[Sum[1/((n!)^n), {n, 0, Infinity}], 120]] // First (* Michael De Vlieger, Sep 22 2015 *)

Prog

(PARI) suminf(k=0, 1/k!^k) \\ Michel Marcus, Sep 20 2022

Crossrefs

Sum of 1/A036740(n).

Sequence in context: A286099 A098366 A284127 * A284827 A241306 A336073

Adjacent sequences: A261111 A261112 A261113 * A261115 A261116 A261117

Keyword

cons,easy,nonn

Author

Daniel Suteu, Sep 20 2015

Status

approved