A387983 Decimal expansion of Sum_{k>=1} k^(-5*k).

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

Offset

1,5

Links

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

Michael Ian Shamos, Shamos's Catalog of the Real Numbers, (2011). See p. 28.

Example

1.0009766321926288743135445653453126212238867077321782587...

Mathematica

First[RealDigits[N[Sum[1/k^(5 k), {k, 1, Infinity}], 110]]]

Prog

(PARI) sumpos(k = 1, k^(-5*k)) \\ Amiram Eldar, Oct 14 2025

Crossrefs

Cf. A073009, A086648.

Sequence in context: A393897 A069181 A214552 * A329088 A375887 A154678

Adjacent sequences: A387980 A387981 A387982 * A387984 A387985 A387986

Keyword

nonn,cons

Author

Jason Bard, Oct 13 2025

Status

approved