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 A223981 Number of n X n 0..3 arrays with rows unimodal and columns nondecreasing 1
 4, 100, 5029, 358118, 31831914, 3322756326, 392525216516, 51162688962195, 7224066705841458, 1089938030989276020, 173886286002145386302, 29095306392044768817550, 5072863442986308208335738 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A223987 LINKS R. H. Hardin, Table of n, a(n) for n = 1..14 EXAMPLE Some solutions for n=3 ..0..2..1....0..2..0....0..1..2....0..3..1....1..1..2....0..2..0....1..3..0 ..2..2..1....1..3..0....0..1..2....1..3..3....1..1..2....0..2..1....2..3..0 ..2..2..2....1..3..3....2..2..3....1..3..3....3..2..2....0..3..3....2..3..2 CROSSREFS Sequence in context: A266524 A224167 A223858 * A224385 A249939 A224018 Adjacent sequences: A223978 A223979 A223980 * A223982 A223983 A223984 KEYWORD nonn AUTHOR R. H. Hardin Mar 30 2013 STATUS approved

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Last modified September 16 00:43 EDT 2024. Contains 375959 sequences. (Running on oeis4.)