A134877 Decimal expansion of Sum_{k>=1} 1/(k!!)^(k!!).

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

Offset

1,2

Links

Table of n, a(n) for n=1..105.

Example

Sum_{k>=1} 1/(k!!)^(k!!) = 1.28703709664168181471132029755820425904216955340222081026798765926909...

Mathematica

RealDigits[N[Sum[1/n^n, {n, 1, 100}], 200]][[1]]

Crossrefs

Cf. A073009, A100085.

Sequence in context: A009214 A021781 A130820 * A336069 A085298 A011060

Adjacent sequences: A134874 A134875 A134876 * A134878 A134879 A134880

Keyword

nonn,cons

Author

Artur Jasinski, Nov 14 2007

Status

approved