A063039 LCM of unsigned Stirling numbers of the first kind, s(n,k) for 1 <= k <= n; s(n,k) = number of permutations of {1,2,..,n} with k cycles.

1, 1, 6, 66, 4200, 4192200, 5115600, 19083776176080, 10086416728304192640, 126556188275836361347200, 451535899566923284351392000, 1253032399528279799996000622278320876800

Offset

1,3

Links

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

Example

a(4) = lcm(s(4,1), s(4,2), s(4,3), s(4,4)) = lcm(6,11,6,1) = 66.

Crossrefs

Sequence in context: A126459 A054969 A068966 * A082781 A257049 A099147

Adjacent sequences: A063036 A063037 A063038 * A063040 A063041 A063042

Keyword

nonn

Author

Leroy Quet, Aug 03 2001

Status

approved