A372253 - OEIS

%I #8 Apr 28 2024 11:42:34

%S 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,

%T 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,

%U 6,8,4,5,8,3,3,6,6,9,1,5,2,9,5,9,8,1

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

%e 1.79814728056269018090582012433742293292032463437183...

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

%t First[RealDigits[s]]

%Y Cf. A371804.

%K nonn,cons

%O 1,2

%A _Clark Kimberling_, Apr 24 2024