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A224010 Number of nX6 0..2 arrays with rows nondecreasing and antidiagonals unimodal 1
28, 784, 15340, 245055, 3516324, 47735665, 630339756, 8213689391, 106375878027, 1373916879120, 17723771318006, 228519337975633, 2945698436819118, 37967141667302902, 489335430219899681, 6306607945054850639 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 6 of A224012
LINKS
FORMULA
Empirical: a(n) = 28*a(n-1) -283*a(n-2) +1386*a(n-3) -3562*a(n-4) +4940*a(n-5) -3840*a(n-6) -14256*a(n-7) +50007*a(n-8) -26386*a(n-9) +141154*a(n-10) +250789*a(n-11) +41356*a(n-12) +274344*a(n-13) +134400*a(n-14)
EXAMPLE
Some solutions for n=3
..0..0..0..0..0..2....2..2..2..2..2..2....0..0..0..2..2..2....1..1..2..2..2..2
..1..1..1..1..2..2....0..0..1..2..2..2....0..1..2..2..2..2....1..1..1..2..2..2
..0..1..2..2..2..2....0..1..1..1..1..2....2..2..2..2..2..2....0..0..0..1..1..2
CROSSREFS
Sequence in context: A223923 A224351 A224193 * A171302 A189901 A189907
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 30 2013
STATUS
approved

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Last modified March 29 09:14 EDT 2024. Contains 371268 sequences. (Running on oeis4.)