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A212852 Number of nX5 arrays with rows being permutations of 0..4 and no column j greater than column j-1 in all rows 1
1, 3651, 966751, 158408751, 21855093751, 2801736968751, 347190069843751, 42328368099218751, 5119530150996093751, 616756797369980468751, 74155772004699902343751, 8907394925520999511718751 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 5 of A212855

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 246*a(n-1) -20545*a(n-2) +751800*a(n-3) -12911500*a(n-4) +100380000*a(n-5) -304200000*a(n-6) +216000000*a(n-7).

Empirical: a(n) = -2*5^n+3*20^n-4*60^n+120^n+3*30^n-2*10^n+1. R. J. Mathar, Jun 25 2012

EXAMPLE

Some solutions for n=3

..0..3..1..2..4....0..2..4..1..3....0..1..4..3..2....0..2..3..4..1

..1..0..4..3..2....1..0..3..2..4....1..3..0..4..2....0..4..3..1..2

..2..4..1..3..0....1..2..0..4..3....3..1..4..0..2....4..0..1..3..2

CROSSREFS

Sequence in context: A185613 A232837 A252086 * A183781 A252678 A190923

Adjacent sequences:  A212849 A212850 A212851 * A212853 A212854 A212855

KEYWORD

nonn

AUTHOR

R. H. Hardin May 28 2012

STATUS

approved

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Last modified April 18 12:42 EDT 2019. Contains 322209 sequences. (Running on oeis4.)