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A204228
Number of (n+1)X7 0..2 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards
1
192474, 12097076, 694547816, 21958547501, 687853333430, 13629970952083, 271354063234561, 3835838251329000, 54453189904564756, 595162305293032209, 6513931380725003539, 58108694636514434194, 517777689314797178275
OFFSET
1,1
COMMENTS
Column 6 of A204230
LINKS
EXAMPLE
Some solutions for n=4
..1..2..1..2..0..2..1....0..2..2..1..1..2..2....2..2..2..1..1..0..2
..0..0..1..0..2..0..2....1..0..1..1..2..1..2....0..0..1..1..2..2..2
..1..2..1..2..0..2..1....0..2..2..2..1..2..2....2..2..2..1..1..0..2
..0..0..1..1..2..1..1....2..1..0..2..1..2..2....0..0..1..1..2..2..2
..1..2..1..2..1..2..2....0..2..2..2..1..2..2....2..2..2..1..1..1..1
CROSSREFS
Sequence in context: A254420 A254427 A253373 * A270971 A234455 A187676
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 13 2012
STATUS
approved