login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A224054 Number of nX5 0..2 arrays with rows and columns unimodal and antidiagonals nondecreasing 1
86, 1915, 18502, 115716, 568107, 2392915, 9064541, 31777144, 104876598, 329032264, 986501800, 2835296957, 7828424002, 20803012406, 53300631267, 131909615889, 315895583635, 733342224413, 1653158389976, 3624784596348 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A224057

LINKS

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

FORMULA

Empirical: a(n) = (1/1379196149760000)*n^20 + (1/27583922995200)*n^19 + (67/43553562624000)*n^18 + (163/3908653056000)*n^17 + (33853/34871316480000)*n^16 + (190111/10461394944000)*n^15 + (2078491/6974263296000)*n^14 + (221821/55351296000)*n^13 + (343209919/6897623040000)*n^12 + (12543727/32845824000)*n^11 + (5532659291/1072963584000)*n^10 + (47191439329/1609445376000)*n^9 + (4217033948263/13076743680000)*n^8 + (559137652921/373621248000)*n^7 + (8858390764133/1120863744000)*n^6 + (3120341453/532224000)*n^5 + (759212883816859/9262693440000)*n^4 - (58527804403451/154378224000)*n^3 + (36684493649747/24443218800)*n^2 + (34656538003/23279256)*n - 11297 for n>5

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A223915 A224187 A223930 * A224307 A224371 A055534

Adjacent sequences:  A224051 A224052 A224053 * A224055 A224056 A224057

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 30 2013

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 6 02:58 EDT 2022. Contains 355108 sequences. (Running on oeis4.)