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 A206231 Number of (n+1)X2 0..3 arrays with every 2X3 or 3X2 subblock having exactly two equal edges, and new values 0..3 introduced in row major order 1
 15, 60, 310, 1640, 8910, 51066, 294546, 1710184, 10051522, 59273370, 350336326, 2076929912, 12328636710, 73241168202, 435453806538, 2590088923960, 15409982499130, 91703551575882, 545793722630878, 3248685323916392 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 1 of A206238 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 8*a(n-1) -11*a(n-2) +36*a(n-3) -303*a(n-4) +232*a(n-5) +147*a(n-6) +756*a(n-7) for n>8 EXAMPLE Some solutions for n=4 ..0..1....0..0....0..1....0..0....0..0....0..1....0..1....0..0....0..0....0..0 ..0..0....0..1....0..0....0..1....1..0....2..1....2..0....1..1....0..1....0..1 ..0..1....1..2....0..1....1..0....0..1....3..1....0..0....2..1....1..2....1..2 ..1..2....1..1....1..0....0..0....0..0....0..1....3..0....1..0....2..2....1..1 ..1..1....0..1....0..0....2..2....0..2....3..3....2..1....0..0....1..1....0..0 CROSSREFS Sequence in context: A005945 A223337 A110755 * A001756 A022288 A041432 Adjacent sequences:  A206228 A206229 A206230 * A206232 A206233 A206234 KEYWORD nonn AUTHOR R. H. Hardin Feb 05 2012 STATUS approved

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Last modified May 22 16:38 EDT 2013. Contains 225553 sequences.