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 A269029 Number of n X n 0..2 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two exactly once. 1
 0, 24, 348, 18384, 1326576, 208867428, 63310818360, 40013955378312, 51911512873697772, 140039775591497709312, 791864652110724378938904, 9334169232033820587188999592, 232675011644185023762453520339476 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Diagonal of A269035. LINKS R. H. Hardin, Table of n, a(n) for n = 1..14 EXAMPLE Some solutions for n=4 ..2..2..2..2. .2..1..0..0. .2..1..0..2. .2..1..2..2. .0..1..2..1 ..2..2..2..1. .0..0..0..0. .0..1..2..1. .0..1..2..1. .2..1..0..2 ..1..2..2..1. .0..0..0..0. .2..1..0..1. .0..1..2..1. .0..1..2..1 ..2..1..2..1. .1..0..0..0. .2..1..2..1. .2..2..2..2. .0..1..2..2 CROSSREFS Cf. A269035. Sequence in context: A056634 A022748 A288968 * A004325 A075621 A293618 Adjacent sequences:  A269026 A269027 A269028 * A269030 A269031 A269032 KEYWORD nonn AUTHOR R. H. Hardin, Feb 18 2016 STATUS approved

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Last modified May 26 02:56 EDT 2020. Contains 334613 sequences. (Running on oeis4.)