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A284337
Number of 4 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
8, 42, 415, 5130, 68458, 966889, 13941789, 204883324, 3047634270, 45762072338, 692220227870, 10532157295267, 161005503857341, 2470999756894057, 38049394554096755, 587563040419449964, 9095438545580032870
OFFSET
1,1
COMMENTS
Row 4 of A284334.
LINKS
EXAMPLE
Some solutions for n=4
..0..1..1..0. .0..0..0..1. .0..0..1..0. .0..0..0..0. .0..0..1..0
..1..1..1..0. .1..0..0..1. .1..1..1..1. .1..0..1..0. .0..1..0..1
..1..0..0..1. .0..0..1..1. .0..1..0..1. .1..1..1..1. .1..0..1..1
..0..0..0..0. .0..0..1..1. .0..0..1..0. .1..0..1..0. .1..0..1..0
CROSSREFS
Cf. A284334.
Sequence in context: A238723 A316283 A236328 * A052666 A065789 A025064
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 25 2017
STATUS
approved