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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 Table of n, a(n) for n=1..9. 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: A374522 A182159 A065102 * A003776 A222203 A224051 Adjacent sequences: A223923 A223924 A223925 * A223927 A223928 A223929 KEYWORD nonn AUTHOR R. H. Hardin Mar 29 2013 STATUS approved

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Last modified September 11 21:59 EDT 2024. Contains 375839 sequences. (Running on oeis4.)