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A293103

Number of 4 X n 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 two less than the number of 0's adjacent to some 1.

0, 30, 554, 8088, 114318, 1676740, 24773296, 370085158, 5573917456, 84505086146, 1288142241806, 19723300256104, 303110117057606, 4672886017374940, 72233860901133456, 1119204087096130496, 17376470515536487116

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

OFFSET

1,2

COMMENTS

Row 4 of A293100.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..134

EXAMPLE

Some solutions for n=4

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

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

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