OFFSET
0,3
COMMENTS
The 0th Gosper hyperfactorial is the usual factorial function.
EXAMPLE
a(0)=1 since the 0th Gosper hyperfactorial (0!) has one decimal digit.
a(3)=16 since the 3rd Gosper hyperfactorial of 3 is 1952152956156672.
MATHEMATICA
Floor[Table[1+Sum[Log10[k]*(k^n), {k, 1, n}], {n, 1, 18}]]
PROG
(PARI) a(n) = floor(sum(k=1, n, log(k)*k^n/log(10))) + 1; \\ Michel Marcus, Sep 27 2022
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Greg Huber, Aug 13 2022
STATUS
approved