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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A233115 Number of (n+1)X(2+1) 0..2 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 0
112, 1182, 11741, 110078, 980034, 8365600, 69167118, 557105428, 4392700238, 34045606996, 260119493281, 1963609837865, 14674717360823, 108734253071678, 799781540072261, 5845908050962049, 42499114563946926, 307511237752310135 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A233117

LINKS

Table of n, a(n) for n=1..18.

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A234673 A232785 A232850 * A188152 A327633 A210300

Adjacent sequences:  A233112 A233113 A233114 * A233116 A233117 A233118

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 04 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 January 24 19:03 EST 2022. Contains 350565 sequences. (Running on oeis4.)