A372393 - OEIS

%I #6 Jun 07 2024 14:15:09

%S 6,6,7,8,0,4,7,4,1,0,2,5,9,8,2,0,7,2,9,1,7,5,2,7,1,2,0,2,2,9,2,4,0,7,

%T 3,6,1,1,1,8,5,8,6,0,3,4,3,0,8,5,8,9,4,1,9,8,4,3,9,3,9,1,7,0,7,0,5,1,

%U 6,2,7,8,4,6,7,3,9,9,8,1,1,8,9,8,1,3

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

%e 0.667804741025982072917527120229240736111858603430...

%t s = Sum[(-1)^k/(k! + k), {k, 0, 100}];

%t d = N[s, 100]

%t First[RealDigits[d]]

%o (PARI) suminf(k=0, (-1)^k/(k!+k)) \\ _Michel Marcus_, Jun 01 2024

%Y Cf. A372392.

%K nonn,cons

%O 0,1

%A _Clark Kimberling_, May 31 2024