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 A269069 Number of nXn binary arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once. 1
 2, 11, 123, 3288, 165607, 18220241, 4064720816, 1833956006577, 1778703508587227, 3374673365461249568, 14101540722268888633757, 114651904507399541002097761, 2060026489521744559823250922304, 72580676762280474254836112626897875 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A269075. LINKS R. H. Hardin, Table of n, a(n) for n = 1..23 EXAMPLE Some solutions for n=4 ..0..0..0..1. .0..0..1..0. .0..0..0..0. .0..0..1..0. .0..0..0..1 ..0..0..0..1. .1..0..0..1. .1..0..0..0. .1..0..0..0. .1..0..0..1 ..1..0..0..0. .0..0..0..0. .0..0..0..1. .0..0..1..1. .1..0..0..0 ..0..1..0..0. .0..0..0..0. .0..0..0..1. .1..0..0..0. .0..0..1..0 CROSSREFS Cf. A269075. Sequence in context: A155928 A001946 A121337 * A224366 A279703 A206401 Adjacent sequences:  A269066 A269067 A269068 * A269070 A269071 A269072 KEYWORD nonn AUTHOR R. H. Hardin, Feb 19 2016 STATUS approved

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Last modified October 20 22:37 EDT 2019. Contains 328291 sequences. (Running on oeis4.)