|
|
A214905
|
|
Number of nXnXn triangular 0..7 arrays with every horizontal row nondecreasing and having the same average value
|
|
1
|
|
|
8, 20, 136, 2490, 100350, 8156190, 1207302502, 309961452102, 129904063711602, 85673347663408802, 85480932170854384802, 125968968872611859748002, 266580924247101550726536002, 795103957638983793244454088002
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=4
.....3........5........3........3........2........5........3........4
....3.3......5.5......1.5......1.5......0.4......3.7......2.4......3.5
...0.4.5....1.7.7....0.3.6....0.3.6....0.3.3....5.5.5....1.4.4....1.4.7
..0.4.4.4..4.4.6.6..1.1.5.5..1.1.4.6..0.0.3.5..2.6.6.6..1.3.4.4..3.3.5.5
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|