A230531 Number of nX4 0..6 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 7, and upper left element zero

0, 0, 0, 272, 35170, 1003084, 29871142, 868791100, 24721336666, 701187061974, 19798661847118, 557586299587882, 15690379898303712, 441277842759233828, 12407050648291828460, 348792620454513108888, 9804667043727528098580

Offset

1,4

Comments

Column 4 of A230533

Links

R. H. Hardin, Table of n, a(n) for n = 1..37

Example

Some solutions for n=4
..0..6..5..5....0..6..5..4....0..6..3..2....0..1..4..5....0..6..5..4
..1..3..4..6....1..1..2..3....1..5..4..1....6..2..3..6....1..1..2..3
..2..2..1..0....2..0..6..5....2..1..3..0....5..4..3..0....2..0..6..2
..3..4..5..6....3..4..5..4....3..4..5..6....0..1..2..1....3..4..5..4

Crossrefs

Sequence in context: A281691 A035842 A000518 * A283230 A280044 A162009

Adjacent sequences: A230528 A230529 A230530 * A230532 A230533 A230534

Keyword

nonn

Author

R. H. Hardin, Oct 22 2013

Status

approved