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 A231111 Number of 5Xn 0..3 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero 1
 0, 0, 208, 3936, 75346, 1608428, 34716434, 745738376, 16008740616, 343710683498, 7379808223044, 158453102807678, 3402179758062160, 73048972852021136, 1568451546991501818, 33676593841059669470, 723078147640347151670 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Row 5 of A231108 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 EXAMPLE Some solutions for n=4 ..0..1..2..1....0..1..0..1....0..1..0..1....0..1..0..3....0..1..0..3 ..0..3..2..3....2..3..2..1....2..3..2..1....2..3..2..1....2..3..1..0 ..2..1..0..3....2..3..0..3....2..0..3..2....2..1..0..3....1..2..3..1 ..2..3..2..1....2..3..1..0....1..2..1..2....0..3..0..3....1..0..2..3 ..0..1..0..3....1..2..3..2....3..0..3..2....2..1..2..1....3..1..0..3 CROSSREFS Sequence in context: A255074 A172967 A343507 * A339762 A223252 A223610 Adjacent sequences: A231108 A231109 A231110 * A231112 A231113 A231114 KEYWORD nonn AUTHOR R. H. Hardin, Nov 03 2013 STATUS approved

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Last modified May 27 18:18 EDT 2024. Contains 372880 sequences. (Running on oeis4.)