A019437 a(n) = a(n-1)!/a(n-2)!; a(0) = 1, a(1) = 3.

1, 3, 6, 120, 9290976268679343135539052852903295259378814351580596958743987989307824385062448596342880785099979140705774497073908459100742234151955724805414557103318958341618000723968000000000000000000000000000

Offset

0,2

Links

Table of n, a(n) for n=0..4.

Crossrefs

Sequence in context: A074880 A225884 A115647 * A365505 A291982 A309258

Adjacent sequences: A019434 A019435 A019436 * A019438 A019439 A019440

Keyword

nonn

Author

N. J. A. Sloane, Dec 21 2001

Status

approved