The On-Line Encyclopedia of Integer Sequences (OEIS)

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A224187

Number of nX5 0..2 arrays with rows unimodal and columns nondecreasing
(history; published version)

#4 by R. H. Hardin at Mon Apr 01 06:34:11 EDT 2013

STATUS

editing

approved

#3 by R. H. Hardin at Mon Apr 01 06:34:08 EDT 2013

LINKS

R. H. Hardin, <a href="/A224187/b224187.txt">Table of n, a(n) for n = 1..210</a>

#2 by R. H. Hardin at Mon Apr 01 06:33:53 EDT 2013

NAME

allocated for R. H. Hardin

Number of nX5 0..2 arrays with rows unimodal and columns nondecreasing

DATA

86, 1600, 14751, 89380, 408222, 1519738, 4844576, 13669953, 34953776, 82399174, 181434331, 376946128, 744873156, 1409068188, 2565196232, 4513845865, 7705502706, 12800568660, 20748212991, 32888515396, 51083111090, 77880377510

OFFSET

1,1

COMMENTS

Column 5 of A224190

FORMULA

Empirical: a(n) = (1009/907200)*n^10 + (913/36288)*n^9 + (15121/60480)*n^8 + (8677/6048)*n^7 + (226987/43200)*n^6 + (110621/8640)*n^5 + (3804217/181440)*n^4 + (206081/9072)*n^3 + (130433/8400)*n^2 + (3793/630)*n + 1

EXAMPLE

Some solutions for n=3

..0..1..0..0..0....0..1..2..1..1....0..0..1..1..1....0..1..2..1..1

..0..1..1..0..0....0..1..2..1..1....0..2..2..1..1....2..2..2..2..1

..1..2..2..2..2....0..1..2..2..2....0..2..2..1..1....2..2..2..2..1

KEYWORD

allocated

nonn

AUTHOR

R. H. Hardin Apr 01 2013

STATUS

approved

editing

#1 by R. H. Hardin at Mon Apr 01 06:28:24 EDT 2013

NAME

allocated for R. H. Hardin

KEYWORD

allocated

STATUS

approved