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 A269085 Number of nX4 binary arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two not more than once. 1
 13, 76, 428, 2238, 11314, 55620, 268289, 1274435, 5982734, 27813229, 128268964, 587560638, 2675945006, 12126527636, 54715085702, 245932380152, 1101667424213, 4920048498594, 21913218006880, 97358802936939, 431593734805059 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 4 of A269089. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 2*a(n-1) +19*a(n-2) +10*a(n-3) -122*a(n-4) -320*a(n-5) -295*a(n-6) +8*a(n-7) +176*a(n-8) +20*a(n-9) -98*a(n-10) -6*a(n-11) +43*a(n-12) -6*a(n-13) -11*a(n-14) +6*a(n-15) -a(n-16) EXAMPLE Some solutions for n=4 ..1..0..0..1. .1..1..0..0. .0..0..0..0. .0..0..1..0. .1..0..0..0 ..1..0..0..0. .0..0..0..1. .1..0..1..0. .0..0..0..1. .0..0..1..0 ..0..1..0..1. .0..0..0..0. .1..0..0..0. .0..0..1..0. .0..0..0..1 ..0..0..0..0. .0..1..0..1. .0..1..0..0. .1..0..0..0. .0..0..0..0 CROSSREFS Cf. A269089. Sequence in context: A050485 A034265 A282643 * A182077 A269071 A283539 Adjacent sequences: A269082 A269083 A269084 * A269086 A269087 A269088 KEYWORD nonn AUTHOR R. H. Hardin, Feb 19 2016 STATUS approved

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Last modified May 26 09:40 EDT 2024. Contains 372824 sequences. (Running on oeis4.)