login
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.
1
3, 45, 5625, 392320, 13534874, 3413887598, 1130198405370, 53578062122213, 13108218265241141, 992125896408438521, 244355616796007755084, 26142858782722268963104, 5253247467346100142679906
OFFSET
1,1
COMMENTS
Row 3 of A265619.
LINKS
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
CROSSREFS
Cf. A265619.
Sequence in context: A057863 A302156 A229415 * A124488 A086683 A155203
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 10 2015
STATUS
approved