A068099 a(1) = 1; a(n+1) = n! sum{k|n} a(k)/k where sum is over positive divisors k of n.

1, 1, 3, 12, 108, 2712, 327240, 235617840, 1187514095040, 47880568312738560, 17374900629326652478080, 63050039403700556512496620800

Offset

1,3

Links

Table of n, a(n) for n=1..12.

Crossrefs

Sequence in context: A080447 A127059 A178013 * A224818 A032113 A352637

Adjacent sequences: A068096 A068097 A068098 * A068100 A068101 A068102

Keyword

nonn

Author

Leroy Quet, Mar 22 2002

Status

approved