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A231060

Number of nX5 0..3 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero.

0, 68, 1272, 27346, 585880, 12582344, 270096962, 5799242344, 124514793312, 2673473185328, 57402651030122, 1232504863875396, 26463395615097866, 568201785697961358, 12199995225532283910, 261948999886945680148

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Column 5 of A231063

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=4

..0..1..2..3..0....0..3..2..1..0....0..1..2..1..0....0..1..2..3..2

..1..0..3..0..1....1..2..1..2..3....3..0..3..0..3....3..0..1..0..1

..2..1..0..3..2....0..3..2..3..2....2..3..2..1..0....2..3..0..3..2