A184075 Number of (n+1)X4 0..2 arrays with rows and columns in nondecreasing order and with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one

150, 239, 1436, 5760, 25954, 104404, 422992, 1588555, 5471235, 17366119, 50883759, 138309491, 350886736, 834954298, 1873682709, 3985258309, 8070671272, 15625241986, 29027866689, 51922380121, 89705278727, 150134603779

Offset

1,1

Comments

Column 3 of A184081

Links

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

Example

Some solutions for 3X4
..1..1..1..2....0..0..1..2....0..0..0..2....1..1..1..2....0..0..1..1
..1..1..2..1....0..2..0..1....0..1..1..0....1..2..2..2....0..1..0..1
..1..2..1..1....1..0..2..0....1..0..0..1....2..0..2..1....1..0..0..1
...
...4..5..6.......2..3..4.......1..2..3.......5..6..7.......1..2..3...
...5..6..5.......3..4..3.......2..2..2.......5..6..7.......2..1..2...

Crossrefs

Sequence in context: A054729 A116185 A008889 * A207044 A292705 A335145

Adjacent sequences: A184072 A184073 A184074 * A184076 A184077 A184078

Keyword

nonn

Author

R. H. Hardin Jan 09 2011

Status

approved