OFFSET
0,1
LINKS
Eric Weisstein's World of Mathematics, Hyperfactorial.
EXAMPLE
0.759223101851603779577759044955845595913352402184...
MATHEMATICA
With[{m = 105}, RealDigits[N[Sum[(-1)^(n + 1)/Hyperfactorial[n], {n, 1, Infinity}], m + 2], 10, m][[1]]] (* Amiram Eldar, Apr 30 2023 *)
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Ilya Gutkovskiy, Aug 28 2021
STATUS
approved