A183973 Half the number of (n+1)X3 0..3 arrays with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one

992, 13168, 180236, 2735260, 41834260, 664848772, 10590791696, 171342163572, 2773791363468, 45188768213912, 736289744424852, 12028064081660100, 196494751955798320, 3213453373098034744, 52552197090450863696

Offset

1,1

Comments

Column 2 of A183976

Links

R. H. Hardin, Table of n, a(n) for n = 1..134

Example

Some solutions for 4X3
..1..0..2....1..0..2....0..1..0....1..1..1....1..1..1....0..0..0....1..0..2
..2..0..2....2..0..1....1..2..1....1..1..2....2..2..3....2..0..1....3..2..3
..1..1..0....0..1..0....0..1..1....1..1..1....1..1..0....0..1..0....0..1..0
..0..1..2....3..0..2....2..2..2....0..1..1....0..3..2....1..1..0....1..3..1
...
...3..4.......3..3.......4..4.......4..5.......6..7.......2..1.......6..7...
...4..3.......3..2.......4..5.......4..5.......6..6.......3..2.......6..6...
...3..4.......4..3.......5..6.......3..4.......5..6.......3..2.......5..5...

Crossrefs

Sequence in context: A158683 A030645 A010463 * A181601 A181707 A035857

Adjacent sequences: A183970 A183971 A183972 * A183974 A183975 A183976

Keyword

nonn

Author

R. H. Hardin Jan 08 2011

Status

approved