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A230274

Number of n X 7 0..2 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero.

0, 386, 173042, 47524048, 12303458948, 3159756711522, 810027275568580, 207640367754692812, 53220250459310073448, 13640617269270340804640, 3496170706479851061894156, 896086022476439653341182672

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OFFSET

1,2

COMMENTS

Column 7 of A230275.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..26

EXAMPLE

Some solutions for n=3

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

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

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