A269082 - OEIS

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A269082

Number of n X n binary arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two not more than once.

2, 11, 114, 2238, 80422, 5372270, 673690710, 159449028034, 71709929917104, 61507638902069052, 100988524469068110876, 318195132133780181426070, 1928131640777904103958251102, 22507425106868892327680953474828

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

OFFSET

1,1

COMMENTS

Diagonal of A269089.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..26

EXAMPLE

Some solutions for n=4

..0..1..0..0. .1..1..0..1. .0..0..0..1. .0..1..0..0. .1..0..1..1

..1..0..0..0. .0..0..0..0. .1..0..0..0. .0..0..0..1. .0..0..0..0

..0..0..0..0. .0..0..0..1. .1..0..1..0. .0..0..0..0. .1..0..0..1