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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A233051 Number of (2+1)X(n+1) 0..2 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

%I

%S 117,1112,8494,55833,321015,1643645,7654949,32878503,131625788,

%T 495839830,1770680805,6031355004,19703984612,62024181142,188838365213,

%U 557980426201,1604875696815,4504699403782,12367743536793,33281266235062

%N Number of (2+1)X(n+1) 0..2 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

%C Row 2 of A233049

%e Some solutions for n=4

%e ..2..1..1..1..0....1..2..0..0..1....0..0..0..1..1....0..1..1..2..0

%e ..2..0..2..1..2....0..1..2..1..1....1..1..2..0..1....0..0..0..2..1

%e ..0..1..1..2..2....0..1..1..2..2....1..1..1..2..2....1..1..2..1..2

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 03 2013

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 February 2 21:10 EST 2023. Contains 360024 sequences. (Running on oeis4.)