A187600 T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with no 2X2 subblock sum equal to any diagonal or antidiagonal neighbor 2X2 subblock sum

12780, 226450, 226450, 4034228, 8074640, 4034228, 71799716, 292759792, 292759792, 71799716, 1277660426, 10573764644, 21834817212, 10573764644, 1277660426, 22737087954, 381716567508, 1616392693134, 1616392693134

Offset

1,1

Comments

Table starts

........12780.........226450.........4034228........71799716......1277660426

.......226450........8074640.......292759792.....10573764644....381716567508

......4034228......292759792.....21834817212...1616392693134.119535001467744

.....71799716....10573764644...1616392693134.244456883399928

...1277660426...381716567508.119535001467744

..22737087954.13784634186006

.404628180446

Links

R. H. Hardin, Table of n, a(n) for n = 1..31

Example

Some solutions for 5X4
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..1....0..0..0..0
..2..0..1..2....1..0..1..2....0..1..0..1....1..0..2..1....1..2..2..2
..2..2..2..0....1..0..1..0....1..2..0..1....2..0..0..0....0..2..1..2
..0..2..2..2....1..1..1..2....0..1..2..1....1..1..1..0....0..2..1..2

Crossrefs

Sequence in context: A207056 A210105 A235720 * A187597 A203273 A217184

Adjacent sequences: A187597 A187598 A187599 * A187601 A187602 A187603

Keyword

nonn,tabl

Author

R. H. Hardin Mar 11 2011

Status

approved