|
Search: id:A126067
|
|
|
| A126067 |
|
Triangle read by rows: T(n,k) = number of self-converse digraphs with n nodes and k arcs, k=0..n*(n-1). |
|
+0
1
|
|
| 1, 1, 1, 1, 1, 1, 2, 2, 2, 1, 1, 1, 1, 3, 5, 9, 10, 12, 10, 9, 5, 3, 1, 1, 1, 1, 3, 6, 15, 24, 41, 57, 77, 84, 90, 84, 77, 57, 41, 24, 15, 6, 3, 1, 1
(list; graph; listen)
|
|
|
OFFSET
|
1,7
|
|
|
EXAMPLE
|
1; 1,1,1; 1,1,2,2,2,1,1; 1,1,3,5,9,10,12,10,9,5,3,1,1; ....
|
|
CROSSREFS
|
Cf. A052283, A002499(row sums).
Sequence in context: A047971 A029432 A073426 this_sequence A048858 A135265 A076490
Adjacent sequences: A126064 A126065 A126066 this_sequence A126068 A126069 A126070
|
|
KEYWORD
|
more,nonn
|
|
AUTHOR
|
Vladeta Jovovic (vladeta(AT)Eunet.yu), Feb 28 2007
|
|
|
Search completed in 0.002 seconds
|
