|
|
A224114
|
|
T(n,k) = Number of idempotent n X n 0..k matrices of rank 2.
|
|
2
|
|
|
0, 0, 1, 0, 1, 21, 0, 1, 51, 282, 0, 1, 93, 1434, 3070, 0, 1, 147, 4182, 30410, 29505, 0, 1, 213, 9762, 136990, 546465, 260967, 0, 1, 291, 19110, 467290, 3784335, 8815317, 2175236, 0, 1, 381, 34602, 1240310, 18925485, 94529631
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,6
|
|
COMMENTS
|
Table starts:
.......0.......0........0........0.......0.....0...0.0.0
.......1.......1........1........1.......1.....1...1.1
......21......51.......93......147.....213...291.381
.....282....1434.....4182.....9762...19110.34602
....3070...30410...136990...467290.1240310
...29505..546465..3784335.18925485
..260967.8815317.94529631
.2175236
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=3, k=4:
..1..0..2....0..1..3....0..0..1....0..0..0....0..0..0....1..0..0....1..3..0
..0..1..3....0..1..0....0..1..0....3..1..0....0..1..0....0..1..1....0..0..0
..0..0..0....0..0..1....0..0..1....3..0..1....4..0..1....0..0..0....0..3..1
|
|
CROSSREFS
|
|
|
KEYWORD
|
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|