|
|
A233376
|
|
Number of (2+1)X(n+1) 0..2 arrays x(i,j) with row sums sum{x(i,j), j=1..n+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..2+1} nondecreasing.
|
|
1
|
|
|
117, 1046, 7595, 46935, 254725, 1242042, 5538026, 22884715, 88577443, 323908967, 1126962281, 3752622108, 12018652575, 37179997956, 111500267903, 325181295220, 924812060067, 2571036007642, 7001871008078, 18714994291394, 49177003589853
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=4
..0..0..0..1..1....0..0..0..2..2....0..0..1..2..2....0..0..1..1..0
..1..2..0..0..2....1..2..0..2..2....1..2..1..0..1....0..0..0..1..1
..0..0..2..2..2....1..1..2..1..2....0..0..1..2..2....0..0..0..0..2
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|