|
|
A224173
|
|
T(n,k)=Number of nXk 0..3 arrays with rows and antidiagonals unimodal and columns nondecreasing
|
|
12
|
|
|
4, 16, 10, 50, 100, 20, 130, 684, 400, 35, 296, 3526, 4739, 1225, 56, 610, 14751, 38561, 22988, 3136, 84, 1163, 52591, 242114, 272130, 87878, 7056, 120, 2083, 165212, 1253770, 2335459, 1460836, 282372, 14400, 165, 3544, 468292, 5588411, 15925611
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
Table starts
...4....16.......50.......130.........296..........610...........1163
..10...100......684......3526.......14751........52591.........165212
..20...400.....4739.....38561......242114......1253770........5588411
..35..1225....22988....272130.....2335459.....15925611.......91494280
..56..3136....87878...1460836....16625026....143558572.....1012166273
..84..7056...282372...6425876....95808564...1038484760.....8857798353
.120.14400...794220..24197608...468021427...6360047093....65713691148
.165.27225..2010035..80350989..1994287334..33901838632...426013124302
.220.48400..4668304.240416852..7568051210.160168789130..2451904991177
.286.81796.10095924.658890738.25994968917.680269560125.12667946702827
|
|
LINKS
|
|
|
FORMULA
|
Empirical: columns k=1..7 are polynomials of degree 3*k for n>0,0,0,3,6,9,12
Empirical: rows n=1..5 are polynomials of degree 6*n for k>0,0,0,2,6
|
|
EXAMPLE
|
Some solutions for n=3 k=4
..0..0..1..0....0..0..1..2....0..0..3..0....0..2..0..0....0..3..3..1
..1..3..3..1....0..1..3..2....3..3..3..1....1..2..0..0....1..3..3..1
..1..3..3..3....0..3..3..2....3..3..3..2....2..2..1..0....1..3..3..3
|
|
CROSSREFS
|
|
|
KEYWORD
|
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|