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 A188708 Number of 4 X n binary arrays without the pattern 0 0 diagonally or vertically. 1
 8, 49, 304, 1876, 11556, 71152, 438048, 2696784, 16602304, 102209216, 629233216, 3873764352, 23848153088, 146816985344, 903853103104, 5564413613056, 34256339608576, 210893165924352, 1298326906544128, 7992922619695104 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 4 of A188706. LINKS R. H. Hardin, Table of n, a(n) for n = 1..200 FORMULA Empirical: a(n) = 8*a(n-1) - 12*a(n-2) + 4*a(n-3). Empirical g.f.: x*(8 - 15*x + 8*x^2) / (1 - 8*x + 12*x^2 - 4*x^3). - Colin Barker, Apr 28 2018 EXAMPLE Some solutions for 4 X 3: 1 0 0 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 0 1 1 0 1 1 0 0 0 1 1 0 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1 0 0 1 1 1 1 1 0 1 1 0 0 1 1 1 0 0 1 1 1 1 1 1 0 0 0 CROSSREFS Cf. A188706. Sequence in context: A097204 A037539 A037483 * A317752 A273497 A024106 Adjacent sequences: A188705 A188706 A188707 * A188709 A188710 A188711 KEYWORD nonn AUTHOR R. H. Hardin, Apr 08 2011 STATUS approved

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Last modified April 1 05:25 EDT 2023. Contains 361673 sequences. (Running on oeis4.)