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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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 4 of A284334. LINKS R. H. Hardin, Table of n, a(n) for n = 1..128 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 Adjacent sequences: A284334 A284335 A284336 * A284338 A284339 A284340 KEYWORD nonn AUTHOR R. H. Hardin, Mar 25 2017 STATUS approved

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Last modified December 6 21:00 EST 2022. Contains 358648 sequences. (Running on oeis4.)