A269881 - OEIS

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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

(list; graph; refs; listen; history; text; internal format)

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