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 A233014 Number of nX4 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally or vertically, top left element zero, and 1 appearing before 2 in row major order 1
 14, 515, 19643, 750092, 28644884, 1093911305, 41775098873, 1595338735322, 60923990363594, 2326610975034335, 88850362536855143, 3393084193289939192, 129577640587140970544, 4948407992160122812805, 188973510753274141448453 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 4 of A233018 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 46*a(n-1) -312*a(n-2) +530*a(n-3) -263*a(n-4) EXAMPLE Some solutions for n=3 ..0..1..1..3....0..1..1..3....0..0..1..0....0..1..0..1....0..0..1..0 ..1..1..1..3....0..0..0..1....1..1..0..2....1..3..2..3....0..1..0..0 ..3..3..1..1....2..2..2..3....3..1..1..0....3..1..0..1....0..0..2..2 CROSSREFS Sequence in context: A190999 A320288 A344114 * A209096 A159645 A297805 Adjacent sequences: A233011 A233012 A233013 * A233015 A233016 A233017 KEYWORD nonn AUTHOR R. H. Hardin, Dec 03 2013 STATUS approved

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Last modified December 5 19:25 EST 2023. Contains 367593 sequences. (Running on oeis4.)