login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A233362 Number of (n+1)X(3+1) 0..1 arrays x(i,j) with row sums sum{j*x(i,j), j=1..3+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..n+1} nondecreasing 0
23, 113, 568, 2639, 10477, 38240, 132356, 441895, 1419797, 4391603, 13112413, 37979354, 106993204, 293812166, 789782037, 2085497193, 5420670439, 13888977532, 35116145716, 87723703925 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A233366

LINKS

Table of n, a(n) for n=1..20.

EXAMPLE

Some solutions for n=5

..0..0..0..0....1..1..0..0....1..1..0..0....0..0..1..1....0..0..0..1

..1..0..0..0....0..0..1..1....1..0..1..0....1..0..1..1....0..0..0..1

..0..1..1..0....0..0..1..1....1..0..0..1....1..0..1..1....0..1..0..1

..1..1..0..1....0..1..1..1....0..1..1..0....0..1..1..1....0..0..1..1

..0..0..1..1....0..1..1..1....0..1..0..1....1..1..1..1....0..1..1..1

..1..1..1..1....0..1..1..1....0..0..1..1....1..1..1..1....1..1..1..1

CROSSREFS

Sequence in context: A234252 A101804 A142324 * A288751 A070024 A111943

Adjacent sequences:  A233359 A233360 A233361 * A233363 A233364 A233365

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 08 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
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 17 15:32 EST 2020. Contains 331998 sequences. (Running on oeis4.)