A196862 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,4,2,0,1 for x=0,1,2,3,4

1, 13, 113, 787, 7428, 62298, 494579, 3938849, 31419870, 250968250, 2008718820, 16085753439, 128812555358, 1031543802305, 8260521035929, 66148710544824, 529714073173089, 4241953681722567, 33969698176325537, 272030805637262923

Offset

1,2

Comments

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

Column 7 of A196863

Links

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

Example

Some solutions for n=4
..0..0..0..0..0..1..0....0..1..0..0..0..0..0....2..2..2..0..0..0..0
..0..0..1..0..1..4..1....1..4..1..2..2..2..0....2..0..2..0..2..2..2
..0..1..4..1..0..1..0....0..1..0..2..0..2..0....2..0..2..0..2..0..2
..0..0..1..0..0..0..0....0..0..0..2..2..2..0....2..2..2..0..2..2..2

Crossrefs

Sequence in context: A320463 A182022 A211846 * A021076 A125376 A048545

Adjacent sequences: A196859 A196860 A196861 * A196863 A196864 A196865

Keyword

nonn

Author

R. H. Hardin Oct 06 2011

Status

approved