A196475 Number of nX6 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,0,3,2,1 for x=0,1,2,3,4

12, 28, 27, 136, 557, 5955, 38826, 128960, 351238, 1374515, 5837922, 30814351, 167525199, 704218824, 2677605502, 10721905782, 44470299831, 200591500952, 939099305213, 4163383808755, 17808261939750, 75069877372742

Offset

1,1

Comments

Every 0 is next to 0 4's, every 1 is next to 1 0's, every 2 is next to 2 3's, every 3 is next to 3 2's, every 4 is next to 4 1's

Column 6 of A196477

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions for n=4
..0..0..0..1..1..0....0..0..1..1..0..0....0..0..1..1..0..1....1..1..0..0..0..1
..0..0..0..1..1..0....1..1..4..1..0..0....0..0..1..4..1..1....0..1..1..1..1..1
..0..0..0..1..1..0....1..1..1..1..0..0....0..0..1..1..1..0....1..1..1..4..1..0
..0..0..0..1..1..0....0..0..0..1..1..1....1..1..1..0..1..1....1..0..0..1..1..0

Crossrefs

Sequence in context: A068721 A228181 A196208 * A253534 A255136 A087252

Adjacent sequences: A196472 A196473 A196474 * A196476 A196477 A196478

Keyword

nonn

Author

R. H. Hardin Oct 03 2011

Status

approved