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 A205190 Number of (n+1) X 6 0..1 arrays with the number of clockwise edge increases in every 2 X 2 subblock differing from each horizontal or vertical neighbor. 1
 144, 168, 292, 384, 736, 896, 1568, 1920, 3392, 4224, 7520, 9344, 16608, 20608, 36608, 45440, 80736, 100224, 178080, 221056, 392768, 487552, 866272, 1075328, 1910624, 2371712, 4214016, 5230976, 9294304, 11537280, 20499232, 25446272, 45212480 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 5 of A205193. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 2*a(n-2) +a(n-6) for n>9. Empirical g.f.: 4*x*(36 + 42*x + x^2 + 12*x^3 + 38*x^4 + 32*x^5 - 12*x^6 - 10*x^7 - 9*x^8) / (1 - 2*x^2 - x^6). - Colin Barker, Jun 11 2018 EXAMPLE Some solutions for n=4: ..0..0..1..1..0..0....0..0..1..1..1..0....0..0..1..0..0..0....0..1..1..0..0..1 ..0..0..1..1..0..0....1..1..0..1..1..1....0..1..0..0..0..1....0..1..1..0..0..0 ..1..1..0..0..1..1....1..1..1..0..1..1....1..0..0..0..1..0....1..0..0..1..0..0 ..1..1..0..0..1..1....0..1..1..1..0..0....0..0..0..1..0..0....1..0..0..0..1..0 ..1..0..1..1..0..1....1..0..1..1..0..0....0..0..1..0..0..0....0..1..0..0..0..1 CROSSREFS Cf. A205193. Sequence in context: A044868 A162532 A294575 * A085426 A034289 A062917 Adjacent sequences:  A205187 A205188 A205189 * A205191 A205192 A205193 KEYWORD nonn AUTHOR R. H. Hardin, Jan 23 2012 STATUS approved

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Last modified January 17 18:14 EST 2020. Contains 330987 sequences. (Running on oeis4.)