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A198905
Number of nX7 0..4 arrays with values 0..4 introduced in row major order and no element equal to any horizontal or vertical neighbor
2
187, 804833, 3794115705, 17895005957823, 84402688527136201, 398089706066811447174, 1877611081501313948217870, 8855851690895754550489882369, 41769091588504560613470987916898
OFFSET
1,1
COMMENTS
Column 7 of A198906
LINKS
EXAMPLE
Some solutions with values 0 to 4 for n=4
..0..1..0..1..0..2..3....0..1..0..1..0..2..0....0..1..0..1..0..2..1
..1..0..1..0..1..3..2....1..0..1..0..3..0..2....1..0..1..0..3..4..3
..0..1..0..2..0..2..3....0..1..0..2..4..2..4....0..1..0..2..0..1..0
..1..0..2..0..2..4..1....1..0..2..0..2..1..3....1..0..2..0..2..0..2
CROSSREFS
Sequence in context: A208199 A208406 A208413 * A198252 A070257 A204750
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 31 2011
STATUS
approved