A180371 1/8 the number of triangular nXnXn arrays of integers in 1..8 with no element or any of its neighbors having the same value

1, 42, 2520, 136080, 6531840, 314616960

Offset

1,2

Links

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

Crossrefs

Sequence in context: A258393 A187365 A294978 * A046198 A361371 A214580

Adjacent sequences: A180368 A180369 A180370 * A180372 A180373 A180374

Keyword

nonn

Author

R. H. Hardin Sep 01 2010

Status

approved