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A186623
Number of (n+2)X4 0..2 arrays with 3X3 subblock sums nondecreasing rightwards and downwards.
1
317115, 9957573, 313250283, 9626194591, 205142945972, 4375747771546, 93024904363336, 1542711926710876, 25595116082268286, 424415611230113963, 5897079175874583945, 81949864725872441631, 1138621686844736898393
OFFSET
1,1
COMMENTS
Column 2 of A186625
LINKS
EXAMPLE
Some solutions for 6X4
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..0..0..1....2..0..2..2....1..1..0..2....0..0..1..1....1..1..0..2
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..1..1..1..0....0..1..1..1....0..0..2..2....2..2..0..1....1..2..1..2
..0..2..1..2....2..2..2..1....0..2..0..2....0..0..1..2....2..2..0..2
CROSSREFS
Sequence in context: A253755 A309238 A153749 * A202468 A251528 A253341
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 24 2011
STATUS
approved