OFFSET
0,4
COMMENTS
Also the number of trailing zeros in the binary expansion of (n!)!.
LINKS
Stanislav Sykora, Table of n, a(n) for n = 0..399
EXAMPLE
a(4)=22 because (4!)!=620448401733239439360000 is divisible by 2^22 but not by 2^23.
PROG
(PARI) a(n) = n!-hammingweight(n!)
CROSSREFS
KEYWORD
nonn
AUTHOR
Stanislav Sykora, Jul 15 2014
STATUS
approved