A269081 - OEIS

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A269081

Number of 7Xn binary arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once.

128, 1760, 43959, 742688, 14011359, 236272677, 4064720816, 67174864630, 1109043586715, 17995383255288, 290431722641261, 4645047826683577, 73887191299532384, 1168678595574438796, 18400291710723401503

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

OFFSET

1,1

COMMENTS

Row 7 of A269075.

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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