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A223993
Number of n X n 0..2 arrays with antidiagonals unimodal and rows and diagonals nondecreasing
0
3, 31, 476, 7927, 132119, 2160036, 34534687, 540957770, 8329684774, 126518474741, 1901584578700, 28359907789963, 420651674953990, 6217185029060841, 91703594406693983
OFFSET
1,1
COMMENTS
Diagonal of A223999
EXAMPLE
Some solutions for n=3
..0..0..1....0..1..2....0..0..2....1..2..2....0..1..1....0..0..0....0..2..2
..0..0..1....0..0..1....0..1..1....0..1..2....0..1..1....0..1..2....0..0..2
..0..1..1....0..1..2....0..1..1....1..1..1....0..2..2....1..2..2....0..1..1
CROSSREFS
Sequence in context: A126346 A142999 A212917 * A342206 A346313 A143637
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 30 2013
STATUS
approved