login
A184087
Number of (n+1)X2 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
86, 216, 684, 1714, 4434, 10610, 24754, 55451, 120398, 253258, 517352, 1027629, 1987737, 3749525, 6907155, 12442630, 21946647, 37947805, 64395228, 107355159, 176001834, 284007825, 451470045, 707545860, 1094020513, 1670083737
OFFSET
1,1
COMMENTS
Column 1 of A184095
LINKS
EXAMPLE
Some solutions for 3X2
..0..3....1..1....1..2....0..1....1..3....1..3....0..3....0..2....0..2....1..3
..2..2....1..1....2..0....0..3....2..0....2..1....1..1....1..1....0..3....2..3
..3..1....1..1....2..1....2..0....3..0....3..0....2..0....3..0....2..0....2..3
...
...7.......4.......5.......4.......6.......7.......5.......4.......5.......9...
...8.......4.......5.......5.......5.......6.......4.......5.......5.......10...
CROSSREFS
Sequence in context: A202770 A184095 A097693 * A304518 A306112 A184086
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 09 2011
STATUS
approved