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A284217
Number of n X 3 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.
1
3, 13, 70, 467, 3224, 23218, 170155, 1264605, 9488108, 71718240, 545264052, 4165262662, 31943452900, 245786167555, 1896529843618, 14669730799547, 113713016901442, 883107039574428, 6869733556332042, 53519589494550372
OFFSET
1,1
COMMENTS
Column 3 of A284222.
LINKS
EXAMPLE
Some solutions for n=4
..0..1..0. .0..0..1. .0..0..1. .0..1..0. .0..0..1. .0..1..0. .0..0..0
..1..0..1. .0..1..1. .0..0..1. .1..0..1. .0..1..0. .1..0..1. .0..1..1
..1..1..0. .0..1..1. .1..1..0. .0..1..1. .1..1..1. .0..0..0. .1..1..0
..0..1..0. .1..1..1. .0..0..1. .0..1..1. .1..1..1. .1..1..1. .1..0..1
CROSSREFS
Cf. A284222.
Sequence in context: A121586 A024337 A001495 * A213690 A227117 A277922
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 23 2017
STATUS
approved