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 A295199 Number of n X n 0..1 arrays with each 1 horizontally or vertically adjacent to 2 or 4 1's. 0
 1, 2, 8, 42, 438, 8241, 279663, 17574795, 2023191364, 425872679440, 164093026377725, 115549694765467808, 148496731427890025827 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A295205. LINKS Table of n, a(n) for n=1..13. EXAMPLE Some solutions for n=6 ..0..0..0..0..0..0. .1..1..0..1..1..1. .0..1..1..1..1..1. .0..1..1..1..0..0 ..1..1..1..1..0..0. .1..1..1..1..0..1. .0..1..0..0..0..1. .0..1..0..1..0..0 ..1..0..0..1..1..0. .0..1..0..0..0..1. .1..1..0..1..1..1. .1..1..0..1..1..0 ..1..0..0..0..1..0. .0..1..1..0..0..1. .1..0..1..1..0..0. .1..0..0..0..1..1 ..1..1..1..1..1..1. .0..0..1..1..1..1. .1..1..1..0..0..0. .1..1..1..1..0..1 ..0..0..0..0..1..1. .0..0..0..0..0..0. .0..0..0..0..0..0. .0..0..0..1..1..1 CROSSREFS Cf. A295205. Sequence in context: A191994 A153524 A153552 * A191479 A197935 A267619 Adjacent sequences: A295196 A295197 A295198 * A295200 A295201 A295202 KEYWORD nonn AUTHOR R. H. Hardin, Nov 16 2017 STATUS approved

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Last modified June 19 03:10 EDT 2024. Contains 373492 sequences. (Running on oeis4.)