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 A284215 Number of n 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
 1, 6, 70, 6511, 2417194, 3945536189, 26772321109067, 749608559151363940, 85781667864838421304454, 39910247433142071128719168435, 75224282551539452957156354090109083 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A284222. LINKS R. H. Hardin, Table of n, a(n) for n = 1..12 EXAMPLE Some solutions for n=4 ..0..1..0..1. .0..1..1..0. .0..1..1..0. .0..1..1..0. .0..1..1..1 ..0..1..1..1. .1..0..1..1. .0..1..0..1. .0..1..1..1. .0..0..1..0 ..0..1..1..1. .1..0..0..0. .1..0..1..0. .0..1..1..0. .0..1..0..1 ..0..0..1..1. .0..1..1..0. .0..1..1..0. .0..1..0..0. .1..1..1..0 CROSSREFS Cf. A284222. Sequence in context: A365057 A182563 A211036 * A050788 A241883 A297746 Adjacent sequences: A284212 A284213 A284214 * A284216 A284217 A284218 KEYWORD nonn AUTHOR R. H. Hardin, Mar 23 2017 STATUS approved

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Last modified September 14 06:54 EDT 2024. Contains 375920 sequences. (Running on oeis4.)