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 A297577 Number of nX3 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 4 neighboring 1s. 1
 3, 11, 36, 102, 370, 1243, 3854, 13078, 43861, 141109, 468638, 1561065, 5101698, 16842125, 55830567, 183595621, 605376713, 2001499842, 6596762626, 21752445702, 71828204711, 236917416288, 781388833534, 2578812375049, 8507768092491 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 3 of A297582. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = a(n-1) +2*a(n-2) +19*a(n-3) +4*a(n-4) -17*a(n-5) -8*a(n-6) EXAMPLE Some solutions for n=7 ..0..0..0. .1..0..1. .0..0..0. .0..0..0. .0..0..0. .1..1..0. .0..0..0 ..0..1..1. .1..1..1. .0..1..1. .1..0..1. .1..0..0. .0..0..0. .0..0..0 ..0..0..0. .0..0..0. .0..0..0. .0..1..1. .1..1..0. .1..0..1. .0..1..1 ..1..0..1. .0..1..0. .0..0..1. .0..0..1. .1..0..1. .1..1..1. .0..0..0 ..1..1..1. .1..0..0. .1..1..1. .0..0..0. .1..0..1. .0..0..0. .1..0..1 ..0..0..0. .1..0..1. .0..0..1. .0..1..0. .1..1..0. .0..0..1. .0..1..1 ..0..1..1. .1..1..1. .0..0..0. .0..0..1. .1..0..0. .0..1..0. .0..0..1 CROSSREFS Cf. A297582. Sequence in context: A119092 A119177 A213679 * A119126 A119088 A296391 Adjacent sequences:  A297574 A297575 A297576 * A297578 A297579 A297580 KEYWORD nonn AUTHOR R. H. Hardin, Jan 01 2018 STATUS approved

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Last modified March 20 16:59 EDT 2018. Contains 300989 sequences. (Running on oeis4.)