A301835 - OEIS

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A301835

Number of n X n 0..1 arrays with every element equal to 0, 1 or 2 horizontally or antidiagonally adjacent elements, with upper left element zero.

1, 8, 139, 5748, 496085, 97439921, 41966406867, 39919204098331, 84196647385137200, 391960289300558475785, 4034683591387591205214712, 91832712356420807374009031299, 4618825005074327343319160956639454

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

OFFSET

1,2

COMMENTS

Diagonal of A301841.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..16

EXAMPLE

Some solutions for n=5

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

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

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