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 A262918 Number of (4+1) X (n+1) 0..1 arrays with each row divisible by 3 and each column divisible by 7, read as a binary number with top and left being the most significant bits. 1
 5, 9, 53, 137, 853, 2953, 17333, 71721, 394325, 1791209, 9435253, 44924617, 230950613, 1126125513, 5713545653, 28200027881, 142082597845, 705663892009, 3542422689653, 17650591452297, 88436516562773, 441384307595273 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 7*a(n-1) + 11*a(n-2) - 147*a(n-3) + 99*a(n-4) + 777*a(n-5) - 1019*a(n-6) - 637*a(n-7) + 910*a(n-8). Empirical g.f.: x*(5 - 26*x - 65*x^2 + 402*x^3 + 139*x^4 - 1510*x^5 + 273*x^6 + 910*x^7) / ((1 - x)*(1 + x)*(1 - 2*x)*(1 - 5*x)*(1 - 7*x^2)*(1 - 13*x^2)). - Colin Barker, Jan 01 2019 EXAMPLE Some solutions for n=4: ..0..0..0..0..0....1..1..0..0..0....0..0..0..0..0....0..0..0..1..1 ..0..1..1..1..1....0..0..0..1..1....0..1..1..0..0....0..0..0..1..1 ..0..1..1..1..1....1..1..0..1..1....0..1..1..0..0....1..1..0..1..1 ..0..1..1..1..1....0..0..0..1..1....0..1..1..0..0....1..1..0..0..0 ..0..0..0..0..0....1..1..0..0..0....0..0..0..0..0....1..1..0..0..0 CROSSREFS Row 4 of A262917. Sequence in context: A000324 A123817 A124421 * A283918 A284382 A143554 Adjacent sequences:  A262915 A262916 A262917 * A262919 A262920 A262921 KEYWORD nonn AUTHOR R. H. Hardin, Oct 04 2015 STATUS approved

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Last modified October 15 00:14 EDT 2019. Contains 328025 sequences. (Running on oeis4.)