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 A206614 Number of (n+1) X 2 0..2 arrays with every 2 X 3 or 3 X 2 subblock having no more than two equal edges, and new values 0..2 introduced in row major order. 1
 14, 86, 580, 4035, 27895, 192358, 1327931, 9168477, 63292982, 436934969, 3016371943, 20823400074, 143753294443, 992394181981, 6850947582710, 47295197965905, 326500200032495, 2253978967732298, 15560239102262371 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 1 of A206621. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 7*a(n-1) - 5*a(n-2) + 36*a(n-3) - 42*a(n-4) for n>5. Empirical g.f.: x*(14 - 12*x + 48*x^2 - 99*x^3 + 42*x^4) / (1 - 7*x + 5*x^2 - 36*x^3 + 42*x^4). - Colin Barker, Jun 17 2018 EXAMPLE Some solutions for n=4: ..0..0....0..0....0..0....0..0....0..0....0..1....0..0....0..1....0..0....0..0 ..1..2....1..1....0..1....0..1....0..1....2..2....0..1....2..0....0..1....1..2 ..2..1....1..2....1..2....2..0....1..2....2..1....1..2....1..2....1..2....2..1 ..2..2....2..0....0..2....2..2....0..2....0..2....2..2....2..0....1..1....2..0 ..1..0....1..1....0..1....0..0....2..0....2..2....2..1....0..1....2..0....2..1 CROSSREFS Cf. A206621. Sequence in context: A213121 A125324 A126482 * A345107 A321941 A116343 Adjacent sequences: A206611 A206612 A206613 * A206615 A206616 A206617 KEYWORD nonn AUTHOR R. H. Hardin, Feb 10 2012 STATUS approved

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Last modified May 20 14:08 EDT 2024. Contains 372717 sequences. (Running on oeis4.)