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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A223915 Number of nX5 0..2 arrays with rows and antidiagonals unimodal and columns nondecreasing 1
 86, 1600, 13347, 74040, 319156, 1147712, 3588729, 10031780, 25574524, 60357024, 133401811, 278664144, 554222764, 1055811684, 1936212233, 3432395716, 5902734700, 9877089124, 16123126195, 25732854408, 40234046052, 61731993272 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 5 of A223918 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = (1009/907200)*n^10 + (1009/60480)*n^9 + (4919/30240)*n^8 + (293/288)*n^7 + (196597/43200)*n^6 + (35317/2880)*n^5 + (1341229/45360)*n^4 + (115123/3024)*n^3 + (38483/3150)*n^2 - (868/15)*n + 4 for n>2 EXAMPLE Some solutions for n=3 ..0..0..1..0..0....0..2..2..1..0....0..0..2..1..0....0..0..0..1..0 ..0..1..2..1..0....0..2..2..1..0....0..2..2..1..0....0..1..1..2..1 ..0..2..2..2..0....0..2..2..2..2....0..2..2..1..1....0..1..2..2..1 CROSSREFS Sequence in context: A242092 A232859 A224259 * A224187 A223930 A224054 Adjacent sequences:  A223912 A223913 A223914 * A223916 A223917 A223918 KEYWORD nonn AUTHOR R. H. Hardin Mar 29 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.

Last modified June 27 05:25 EDT 2022. Contains 354888 sequences. (Running on oeis4.)