A066358 Recurring permutations: a(n) = P(a(n-1),a(n-2)) where P(x,y) = x!/(x-y)!.

1, 3, 3, 6, 120, 2629976731200

Offset

0,2

Links

Table of n, a(n) for n=0..5.

Crossrefs

Cf. A049022, A019437.

Sequence in context: A221925 A221688 A366820 * A261295 A118031 A335726

Adjacent sequences: A066355 A066356 A066357 * A066359 A066360 A066361

Keyword

easy,nonn

Author

Floor van Lamoen, Dec 20 2001

Status

approved