A230688 Number of 4Xn 0..6 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value (x(i,j)+1) mod 7, and upper left element zero

0, 0, 0, 2, 360, 24050, 974548, 30543988, 887242598, 25527277010, 725996132762, 20534469030504, 579032138128464, 16301589383840348, 458588230927764470, 12895597377195089490, 362551408586663834792, 10191809036721993234348

Offset

1,4

Comments

Row 4 of A230686

Links

R. H. Hardin, Table of n, a(n) for n = 1..40

Example

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

Crossrefs

Sequence in context: A187523 A172860 A164700 * A325629 A362476 A062381

Adjacent sequences: A230685 A230686 A230687 * A230689 A230690 A230691

Keyword

nonn

Author

R. H. Hardin, Oct 27 2013

Status

approved