A372253 Decimal expansion of Sum_{k>=0} (1 / (k^2 + k + 1)).

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

Offset

1,2

Links

Table of n, a(n) for n=1..86.

Example

1.79814728056269018090582012433742293292032463437183...

Mathematica

s = Chop[N[Sum[1/(k^2 + k + 1), {k, 0, Infinity}], 120]]
First[RealDigits[s]]

Crossrefs

Cf. A371804.

Sequence in context: A340220 A182688 A342571 * A256924 A377606 A348668

Adjacent sequences: A372250 A372251 A372252 * A372254 A372255 A372256

Keyword

nonn,cons

Author

Clark Kimberling, Apr 24 2024

Status

approved