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A223926 Number of n X n 0..2 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing 0
3, 54, 1116, 21334, 386495, 6621074, 108796955, 1735753333, 27144561576 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A223933
LINKS
EXAMPLE
Some solutions for n=3
..2..1..1....0..1..0....0..2..1....1..0..0....0..0..0....0..0..0....0..0..0
..0..2..2....1..1..2....2..2..2....0..1..0....0..0..2....0..2..2....1..0..0
..0..0..2....1..2..2....2..2..2....0..1..1....1..2..2....1..1..2....1..1..2
CROSSREFS
Sequence in context: A157541 A182159 A065102 * A003776 A222203 A224051
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 29 2013
STATUS
approved

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Last modified March 29 02:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)