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A180843 T(n,k)=number of nXk arrays containing k indistinguishable copies of 1..n with lexicographical ordering of rows strictly increasing and columns strictly decreasing 3
1, 1, 1, 1, 0, 1, 1, 1, 2, 1, 1, 0, 19, 17, 1, 1, 0, 44, 596, 131, 1, 1, 0, 98, 14284, 37423, 1220, 1, 1, 0, 189, 312424, 8554238, 3746117, 13796, 1, 1, 0, 298, 6236734, 1867529572, 9893281255, 545626043, 183095, 1, 1, 0, 379, 113114480, 388782928110 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,9

COMMENTS

Table starts

.1......1.........1..........1..........1............1.........1...1.1.1

.1......0.........1..........0..........0............0.........0...0.0

.1......2........19.........44.........98..........189.......298.379

.1.....17.......596......14284.....312424......6236734.113114480

.1....131.....37423....8554238.1867529572.388782928110

.1...1220...3746117.9893281255

.1..13796.545626043

.1.183095

.1

LINKS

Table of n, a(n) for n=1..50.

CROSSREFS

Sequence in context: A096801 A072407 A061158 * A318141 A085979 A330986

Adjacent sequences:  A180840 A180841 A180842 * A180844 A180845 A180846

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Sep 20 2010

STATUS

approved

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Last modified April 17 18:52 EDT 2021. Contains 343070 sequences. (Running on oeis4.)