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!)
A233059 Number of (n+1)X(2+1) 0..1 arrays x(i,j) with row sums sum{x(i,j), j=1..2+1} nondecreasing, and column sums sum{i*x(i,j), i=1..n+1} nondecreasing 1
13, 47, 161, 564, 1933, 6529, 21904, 72710, 238992, 781279, 2537019, 8187471, 26318697, 84221878, 268396362, 852861982, 2701532776, 8532060967, 26887756403, 84535960052, 265197189246, 830543999898, 2596441897488, 8103132791812 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A233062

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..35

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A004467 A261395 A141865 * A183775 A146806 A300337

Adjacent sequences:  A233056 A233057 A233058 * A233060 A233061 A233062

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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 17 18:17 EDT 2021. Contains 343986 sequences. (Running on oeis4.)