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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. 1
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

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

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

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

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

CROSSREFS

Cf. A269075.

Sequence in context: A202961 A239540 A306746 * A200789 A250356 A269587

Adjacent sequences:  A269078 A269079 A269080 * A269082 A269083 A269084

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 19 2016

STATUS

approved

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Last modified August 25 14:35 EDT 2019. Contains 326324 sequences. (Running on oeis4.)