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A269759 Number of n X n 0..5 arrays with some element plus some horizontally or vertically adjacent neighbor totalling five exactly once. 0
0, 480, 2624640, 170119348800, 162622227315688800, 2472167532788732096214720, 619355759819182556284664539149600, 2608485818609834735993758098252271168054560 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A269767.

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=2

..4..5. .4..4. .2..3. .3..5. .2..2. .1..2. .2..2. .0..0. .4..0. .4..0

..2..3. .1..0. .4..4. .0..5. .3..0. .5..3. .0..3. .5..4. .4..5. .5..5

CROSSREFS

Cf. A269767.

Sequence in context: A289744 A287933 A304395 * A317174 A020286 A064909

Adjacent sequences:  A269756 A269757 A269758 * A269760 A269761 A269762

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 04 2016

STATUS

approved

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Last modified January 25 09:48 EST 2021. Contains 340416 sequences. (Running on oeis4.)