A187598 Number of (n+2)X4 0..2 arrays with no 2X2 subblock sum equal to any diagonal or antidiagonal neighbor 2X2 subblock sum

226450, 8074640, 292759792, 10573764644, 381716567508, 13784634186006, 497795278276942, 17976310976633484, 649156690187966610, 23442274798739620648, 846544307284117366816, 30570298979230731956070

Offset

1,1

Comments

Column 2 of A187600

Links

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

Example

Some solutions for 6X4
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..1..0..0..1....1..0..0..1....1..0..0..1....1..0..0..1....1..0..0..1
..0..0..0..0....1..0..0..0....0..0..0..0....1..0..0..0....0..0..0..0
..2..2..2..2....0..2..1..1....0..2..1..1....0..2..1..0....1..2..0..2
..1..0..1..0....0..0..2..2....2..2..0..0....2..0..1..2....2..2..2..1
..0..2..0..1....2..1..1..1....1..1..2..2....2..1..0..0....2..1..1..0

Crossrefs

Sequence in context: A237032 A067141 A234775 * A061134 A179730 A287900

Adjacent sequences: A187595 A187596 A187597 * A187599 A187600 A187601

Keyword

nonn

Author

R. H. Hardin Mar 11 2011

Status

approved