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A224275
Number of n X n 0..3 arrays with diagonals and rows unimodal and antidiagonals nondecreasing
0
4, 160, 13683, 1334973, 137489538, 14587480744, 1597855917875, 182011677068828, 21714188491890254, 2721720866571310952, 357937736330145145387
OFFSET
1,1
COMMENTS
Diagonal of A224281
EXAMPLE
Some solutions for n=3
..2..0..0....0..1..1....0..0..1....0..0..0....0..0..1....2..1..1....0..0..0
..2..2..1....2..2..2....3..2..2....0..1..1....3..3..1....3..2..1....0..0..1
..3..3..3....2..3..0....2..2..2....2..2..1....3..3..2....2..2..3....1..2..1
CROSSREFS
Sequence in context: A278770 A264568 A224044 * A224198 A104133 A214007
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 02 2013
STATUS
approved