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A269220 Number of 7Xn 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three exactly once. 1
0, 7375872, 2039727744, 599456856000, 163535201141376, 43468685827935816, 11273191243423937904, 2872961996154823592256, 722010748558146090563664, 179436639887553691981747008, 44187481124719769649267286128 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 7 of A269214.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=2

..0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0

..0..2. .0..0. .0..0. .0..0. .0..0. .0..2. .0..0. .0..0. .0..2. .0..0

..2..0. .0..1. .1..0. .1..0. .0..0. .0..2. .1..1. .1..1. .0..0. .1..3

..2..3. .3..3. .1..1. .2..3. .2..2. .2..2. .2..3. .0..1. .0..0. .3..1

..1..1. .2..2. .1..3. .0..2. .3..3. .3..2. .2..2. .3..2. .1..3. .3..1

..3..1. .2..3. .3..2. .3..2. .2..1. .0..3. .2..0. .1..3. .1..1. .3..2

..3..2. .3..3. .3..2. .3..3. .0..0. .2..2. .1..3. .1..3. .0..0. .0..1

CROSSREFS

Cf. A269214.

Sequence in context: A116259 A158256 A306873 * A268406 A302135 A104921

Adjacent sequences:  A269217 A269218 A269219 * A269221 A269222 A269223

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 20 2016

STATUS

approved

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Last modified June 16 21:18 EDT 2019. Contains 324155 sequences. (Running on oeis4.)