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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A233057 Number of (2+1)X(n+1) 0..3 arrays x(i,j) with row sums sum{j*x(i,j), j=1..n+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..2+1} nondecreasing 0
 567, 12943, 230008, 3388003, 42636091, 469323351, 4607489801, 40982900059, 334422112594, 2527496746520, 17840951367541, 118449958746452, 743824605320424 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 2 of A233055 LINKS Table of n, a(n) for n=1..13. EXAMPLE Some solutions for n=2 ..0..3..0....1..1..1....0..3..0....0..1..3....0..0..0....0..2..1....0..0..1 ..0..3..0....3..2..3....2..0..2....0..3..3....2..0..3....1..1..3....2..1..1 ..0..1..3....2..3..3....1..3..3....0..3..3....0..1..3....3..3..3....0..3..3 CROSSREFS Sequence in context: A252599 A023099 A209954 * A087424 A134922 A322688 Adjacent sequences: A233054 A233055 A233056 * A233058 A233059 A233060 KEYWORD nonn AUTHOR R. H. Hardin, Dec 03 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 October 2 13:28 EDT 2023. Contains 365833 sequences. (Running on oeis4.)