login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A232884 Number of (n+1)X(1+1) 0..3 arrays x(i,j) with row sums sum{x(i,j), j=1..1+1} nondecreasing, and column sums sum{i*x(i,j), i=1..n+1} nondecreasing 1
83, 578, 3473, 18886, 95877, 462013, 2138895, 9598529, 42066595, 180962518, 766952748, 3211904613, 13326255821, 54883286211, 224676789663, 915299640977, 3714702927144, 15031048272068, 60672346264225, 244415984430509 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A232886

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..30

EXAMPLE

Some solutions for n=5

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

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

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

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

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

..3..3....3..3....2..3....3..3....3..3....2..3....3..2....1..3....2..3....1..2

CROSSREFS

Sequence in context: A033248 A232886 A232887 * A142289 A164758 A142751

Adjacent sequences:  A232881 A232882 A232883 * A232885 A232886 A232887

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 02 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 | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified August 23 06:11 EDT 2017. Contains 290958 sequences.