|
Search: id:A135589
|
|
|
| A135589 |
|
Triangle T(n,k) read by rows: number of k X k symmetric (0,1)-matrices with exactly n entries equal to 1 and no zero rows or columns. |
|
+0
4
|
|
| 1, 0, 1, 0, 0, 2, 0, 0, 2, 4, 0, 0, 1, 9, 10, 0, 0, 0, 12, 36, 26, 0, 0, 0, 10, 76, 140, 76, 0, 0, 0, 6, 116, 420, 540, 232, 0, 0, 0, 3, 138, 915, 2160, 2142, 764, 0, 0, 0, 1, 136, 1605, 6230, 10766, 8624, 2620, 0, 0, 0, 0, 116, 2372, 14436, 39130, 53312, 35856, 9496, 0, 0, 0, 0
(list; table; graph; listen)
|
|
|
OFFSET
|
0,6
|
|
|
EXAMPLE
|
1
0,1
0,0,2
0,0,2,4
0,0,1,9,10
0,0,0,12,36,26
0,0,0,10,76,140,76
0,0,0,6,116,420,540,232
|
|
CROSSREFS
|
Sequence in context: A115509 A134312 A020474 this_sequence A158122 A028641 A141416
Adjacent sequences: A135586 A135587 A135588 this_sequence A135590 A135591 A135592
|
|
KEYWORD
|
nonn,tabl
|
|
AUTHOR
|
Vladeta Jovovic (vladeta(AT)eunet.rs), Feb 25 2008
|
|
|
Search completed in 0.002 seconds
|
