OFFSET
1,2
COMMENTS
Motivated by 6!=10!/7!.
It appears that for most n, a(n) = n. The sequence of n for which a(n) != n begins: 6, 28, 42, 45, 66, 77, 91, 110, 126 ... that is probably A120624. - Michel Marcus, Aug 21 2013
PROG
(PARI) for (n=1, 100, k=1; while((n+k)!/(n+1)!%n!, k++); print1(k, ", "))
CROSSREFS
KEYWORD
nonn
AUTHOR
Jaume Oliver Lafont, Mar 17 2009
STATUS
approved