Triangle read by rows where T(n,k) is the number of unlabeled loop-graphs on up to n vertices with k loops and n-k non-loops.
A368836
Triangle read by rows where T(n,k) is the number of unlabeled loop-graphs on up to n vertices with k loops and n-k non-loops.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =0a(4) =1a(5) =1a(6) =1a(7) =2a(8) =2a(9) =1a(10) =2a(11) =6a(12) =6a(13) =2a(14) =1a(15) =6a(16) =17a(17) =18a(18) =8a(19) =2a(20) =1a(21) =21a(22) =52a(23) =58a(24) =30a(25) =9a(26) =2a(27) =1a(28) =65a(29) =173
External references
- oeis: A368836