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A265621

Number of 3 X n 0..3*n-1 arrays with upper left zero and lower right 3*n-1 and each element differing from its horizontal and diagonal neighbors by a power of two.

3, 45, 5625, 392320, 13534874, 3413887598, 1130198405370, 53578062122213, 13108218265241141, 992125896408438521, 244355616796007755084, 26142858782722268963104, 5253247467346100142679906

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OFFSET

1,1

COMMENTS

Row 3 of A265619.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..33

EXAMPLE

Some solutions for n=3

..0..1..3....0..2..1....0..4..5....0..2..3....0..4..3....0..4..3....0..8..7

..2..4..3....2..4..6....6..4..5....3..4..3....0..4..2....2..4..5....8..4..6

..5..6..8....2..0..8....8..7..8....3..4..8....5..4..8....8..4..8....5..7..8