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A269005 Number of n X n binary arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two exactly once. 1
0, 4, 46, 2136, 109058, 14382480, 3258530608, 1582785864320, 1554970236400402, 3055129067325800608, 12891237725516640144940, 106775629834644247372248448, 1932363567303596958505554161216, 68821810412730939070416537380998580 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A269011.
LINKS
EXAMPLE
Some solutions for n=4
..0..0..0..0. .1..0..0..0. .1..0..0..1. .0..0..1..0. .1..0..0..0
..1..0..1..0. .0..0..0..1. .1..0..0..0. .1..0..1..0. .0..0..0..0
..0..0..0..0. .1..1..0..0. .1..0..0..1. .0..0..0..0. .1..0..0..0
..1..0..1..1. .0..0..0..1. .0..0..1..0. .0..1..1..0. .0..0..1..1
CROSSREFS
Cf. A269011.
Sequence in context: A113096 A135078 A195243 * A107766 A065777 A193485
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 17 2016
STATUS
approved

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Last modified April 14 17:12 EDT 2024. Contains 371666 sequences. (Running on oeis4.)