A139471 Incorrect version of A154641 and A154644.

1, 3, 20, 108, 564, 3030

Offset

1,2

Links

Table of n, a(n) for n=1..6.

Crossrefs

Sequence in context: A025535 A119693 A158243 * A154641 A178711 A257067

Adjacent sequences: A139468 A139469 A139470 * A139472 A139473 A139474

Keyword

dead

Status

approved