A371804 Decimal expansion of Sum_{k>=0} (-1)^k / (k^2 + k + 1).

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

Offset

0,1

Links

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

Example

0.761310204001103486388731278677838411604882...

Mathematica

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

Crossrefs

Cf. A372253.

Sequence in context: A353823 A247444 A319331 * A010511 A073744 A112253

Adjacent sequences: A371801 A371802 A371803 * A371805 A371806 A371807

Keyword

nonn,cons

Author

Clark Kimberling, Apr 24 2024

Status

approved