A269881 Number of n X n 0..5 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling five exactly once.

0, 432, 943488, 16086672048, 2524680110862912, 3917218310933741356320, 62120579251514053648879287744

Offset

1,2

Comments

Diagonal of A269888.

Links

Table of n, a(n) for n=1..7.

Example

Some solutions for n=2
..2..5. .3..5. .0..1. .5..1. .4..1. .0..1. .0..1. .1..3. .0..2. .3..0
..2..0. .4..2. .3..5. .3..0. .5..2. .5..2. .2..4. .2..1. .4..3. .3..5

Crossrefs

Cf. A269888.

Sequence in context: A300053 A047804 A008691 * A193141 A360652 A051964

Adjacent sequences: A269878 A269879 A269880 * A269882 A269883 A269884

Keyword

nonn

Author

R. H. Hardin, Mar 06 2016

Status

approved