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A284336
Number of 3 X n 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.
1
4, 13, 49, 373, 2259, 18114, 120058, 959041, 6725380, 53524100, 389145239, 3078502323, 22909373317, 180462930528, 1364622501692, 10722180215723, 81993405397067, 643447267719348, 4960055945696896, 38910411283028492
OFFSET
1,1
COMMENTS
Row 3 of A284334.
LINKS
EXAMPLE
Some solutions for n=4
..0..1..1..1. .0..0..0..0. .0..0..0..1. .0..1..1..0. .0..0..1..1
..1..1..0..0. .0..0..0..0. .0..1..1..1. .0..1..0..1. .1..1..0..0
..0..0..1..0. .0..0..0..0. .1..0..0..1. .1..0..1..0. .1..1..0..0
CROSSREFS
Cf. A284334.
Sequence in context: A149453 A149454 A101125 * A230081 A364907 A299699
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 25 2017
STATUS
approved