A180373 1/6 the number of n X n arrays of integers in 1..6 with no element or any of its neighbors having the same value.

1, 60, 3120, 231720, 20495520, 2637990720

Offset

1,2

Links

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

Crossrefs

Sequence in context: A082670 A084659 A230568 * A264947 A004297 A223657

Adjacent sequences: A180370 A180371 A180372 * A180374 A180375 A180376

Keyword

nonn

Author

R. H. Hardin, Sep 01 2010

Status

approved