A197372 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,4,1,0,1 for x=0,1,2,3,4

1, 99, 1873, 19387, 355929, 5198997, 79831388, 1224953019, 18720559109, 286695564063, 4387392987375, 67144325650311, 1027713403550939, 15728844758196796, 240730652255271607, 3684411293604740543

Offset

1,2

Comments

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

Column 7 of A197373

Links

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

Example

Some solutions containing all values 0 to 4 for n=4
..0..0..1..0..3..0..0....0..0..0..3..0..0..0....0..0..3..0..0..1..2
..0..1..4..1..0..1..0....0..1..0..0..0..0..3....0..0..0..0..1..4..1
..3..0..1..0..1..4..1....1..4..1..0..0..0..0....0..0..0..0..0..1..0
..0..3..0..3..0..1..2....2..1..0..3..0..0..0....0..0..0..0..3..0..0

Crossrefs

Sequence in context: A196785 A196808 A305721 * A174944 A221330 A246247

Adjacent sequences: A197369 A197370 A197371 * A197373 A197374 A197375

Keyword

nonn

Author

R. H. Hardin Oct 14 2011

Status

approved