A005607 a(n) = (a(n-1) + a(n-2))!.

1, 1, 2, 6, 40320

Offset

0,3

Comments

The next term has 168215 digits and is too large to include.

Links

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

J. T. Butler, Fanout-free networks of multivalued gates, Proc. Internat. Symposium Multiple-Valued Logic, Charlotte NC, 1977. IEEE Press, NY, 1977, pp. 39-46. (Annotated scanned copy)

J. T. Butler, Letter to N. J. A. Sloane, Dec. 1978

Crossrefs

Sequence in context: A121167 A115658 A337096 * A184391 A161563 A135408

Adjacent sequences: A005604 A005605 A005606 * A005608 A005609 A005610

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved