OFFSET
0,9
COMMENTS
Every nonnegative integer occurs at least 4 times.
Each integer k > 14 appears fewer than k times.
The only integers k that occur exactly k times are 11, 13 and 14.
MATHEMATICA
Array[Floor@ Sqrt[Log10[#!]] &, 93, 0]
PROG
(PARI) a(n) = sqrtint(log(n!)/log(10)); \\ Michel Marcus, Sep 27 2023
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul F. Marrero Romero, Aug 17 2023
STATUS
approved