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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A224281

LINKS

Table of n, a(n) for n=1..11.

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

Adjacent sequences:  A224272 A224273 A224274 * A224276 A224277 A224278

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 02 2013

STATUS

approved

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Last modified May 23 03:10 EDT 2019. Contains 323507 sequences. (Running on oeis4.)