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A202733
Number of nX6 nonnegative integer arrays each row and column an ascent sequence (interior element no greater than one plus up-steps preceding it) and the lower right element equal to min(n,6)-1
1
1, 16, 406, 10296, 97794, 44976, 182593546, 171227525652, 82937584072426, 28117713663244916, 7789814305950338052, 1924690312553582114842, 446311604380789427924132, 100047008743872523216459380
OFFSET
1,2
COMMENTS
Column 6 of A202735
LINKS
EXAMPLE
Some solutions for n=4
..0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0
..0..0..1..1..1..1....0..0..1..1..1..1....0..0..0..1..0..1....0..0..1..1..1..1
..0..1..2..2..0..2....0..1..0..2..0..2....0..1..0..1..0..2....0..1..2..1..1..2
..0..0..1..1..2..3....0..1..1..2..1..3....0..1..0..1..0..3....0..0..1..0..1..3
CROSSREFS
Sequence in context: A300808 A301447 A374881 * A261833 A172205 A209362
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 23 2011
STATUS
approved