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 A284224 Number of 3 X n 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
 4, 19, 70, 499, 3214, 22729, 163708, 1209005, 9018250, 67956917, 515031078, 3926103884, 30049105764, 230871573750, 1779036977175, 13746097605518, 106448904000193, 826010061981163, 6420762665883318, 49989175241774203 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 3 of A284222. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 EXAMPLE Some solutions for n=4 ..0..1..0..1. .0..0..1..1. .0..0..0..1. .0..1..1..0. .0..0..0..1 ..0..0..1..1. .0..0..0..1. .0..1..1..1. .0..1..1..0. .1..0..1..1 ..1..0..0..1. .0..0..0..1. .1..1..1..1. .0..1..0..1. .0..0..1..1 CROSSREFS Cf. A284222. Sequence in context: A167247 A267192 A219972 * A268214 A027208 A085348 Adjacent sequences: A284221 A284222 A284223 * A284225 A284226 A284227 KEYWORD nonn AUTHOR R. H. Hardin, Mar 23 2017 STATUS approved

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Last modified March 2 16:48 EST 2024. Contains 370497 sequences. (Running on oeis4.)