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

52, 272410, 5315840795, 116492275674072, 2572072097029554676, 56817439251356046537693, 1255145613308486512244031328, 27727293796669883715931085888092, 612520905593913038338760996059873808

Offset

1,1

Comments

Column 6 of A198723

Links

R. H. Hardin, Table of n, a(n) for n = 1..11

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

Adjacent sequences: A198718 A198719 A198720 * A198722 A198723 A198724

Keyword

nonn

Author

R. H. Hardin Oct 29 2011

Status

approved