A223400 4X4 square grid graph coloring a rectangular array: number of nX6 0..15 arrays where 0..15 label nodes of the square grid graph and every array movement to a horizontal or vertical neighbor moves along an edge of this graph

5096, 943016, 199425400, 43699580872, 9705525235832, 2167784359988816, 485449397967176280, 108848309856453879360, 24421716229987194638264, 5481164676275390586552248, 1230391852175808762117043648

Offset

1,1

Comments

Column 6 of A223402

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=3
..4..0..4..0..1..5....4..0..4..5..1..0....4..0..1..5..9.10....4..0..4..8..9.13
..0..4..0..4..5..9....0..4..5..1..5..1....0..1..2..6.10.11....0..4..0..4..8..9
..4..5..1..0..4..8....4..0..1..2..1..2....4..0..1..5..9.10....4..0..1..0..4..5
Vertex neighbors:
0 -> 1 4
1 -> 0 2 5
2 -> 1 3 6
3 -> 2 7
4 -> 0 5 8
5 -> 4 1 6 9
6 -> 5 2 7 10
7 -> 6 3 11
8 -> 4 9 12
9 -> 8 5 10 13
10 -> 9 6 11 14
11 -> 10 7 15
12 -> 8 13
13 -> 12 9 14
14 -> 13 10 15
15 -> 14 11

Crossrefs

Sequence in context: A034286 A260069 A252143 * A135842 A224492 A330730

Adjacent sequences: A223397 A223398 A223399 * A223401 A223402 A223403

Keyword

nonn

Author

R. H. Hardin Mar 19 2013

Status

approved