login
A184088
Number of (n+1)X3 0..3 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
1
216, 260, 1146, 2848, 9945, 28434, 87119, 254174, 732978, 2062353, 5663089, 15156140, 39373663, 99199976, 241889509, 570721800, 1303028175, 2880190406, 6168364480, 12813006924, 25845550887, 50691467373, 96800121980, 180213143357
OFFSET
1,1
COMMENTS
Column 2 of A184095
LINKS
EXAMPLE
Some solutions for 4X3
..2..2..3....0..0..1....1..2..2....1..1..3....1..2..2....0..0..1....1..1..2
..2..3..2....0..1..0....3..0..3....1..2..0....2..0..2....0..3..0....1..3..1
..2..3..3....1..0..1....3..0..3....1..2..1....2..1..2....1..0..2....2..0..3
..3..3..1....2..0..1....3..0..3....2..1..2....2..1..2....3..1..3....3..1..3
...
...9.10.......1..2.......6..7.......5..6.......5..6.......3..4.......6..7...
..10.11.......2..2.......6..6.......6..5.......5..5.......4..5.......6..7...
..11.10.......3..2.......6..6.......6..6.......6..6.......5..6.......6..7...
CROSSREFS
Sequence in context: A335544 A230400 A001239 * A348609 A205191 A204650
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 09 2011
STATUS
approved