OFFSET
0,1
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..5000
Eric Weisstein's World of Mathematics, Pierce Expansion.
Eric Weisstein's World of Mathematics, Engel Expansion.
FORMULA
Equals 1/A287013. - Amiram Eldar, Nov 19 2020
MAPLE
P:=proc(n) local a, i, k; a:=0; k:=1; for i from 0 by 1 to n do k:=k*i!; a:=a+1/k; print(evalf(1/a, 100)); od; end: P(100);
MATHEMATICA
RealDigits[N[(1/Sum[Product[1/((k - 1)!), {k, 1, n}], {n, 1, 250}]), 100]][[1]] (* G. C. Greubel, Jan 02 2017 *)
CROSSREFS
KEYWORD
AUTHOR
Paolo P. Lava and Giorgio Balzarotti, Feb 26 2008, Apr 18 2008
STATUS
approved