login
A198721
Number of nX6 0..6 arrays with values 0..6 introduced in row major order and no element equal to any horizontal or vertical neighbor
2
52, 272410, 5315840795, 116492275674072, 2572072097029554676, 56817439251356046537693, 1255145613308486512244031328, 27727293796669883715931085888092, 612520905593913038338760996059873808
OFFSET
1,1
COMMENTS
Column 6 of A198723
LINKS
EXAMPLE
Some solutions with all values 0 to 6 for n=3
..0..1..2..3..4..2....0..1..2..1..2..3....0..1..2..3..4..2....0..1..0..2..3..0
..1..0..1..2..3..5....1..0..1..4..3..5....1..0..1..2..1..3....1..0..1..3..4..2
..0..1..0..1..6..0....0..1..0..6..5..4....0..1..0..5..6..4....0..1..3..4..5..6
CROSSREFS
Sequence in context: A208470 A070908 A198980 * A198912 A208300 A038778
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 29 2011
STATUS
approved