Triangle T(n,k) of series-reduced (or homeomorphically irreducible) graphs with loops on n labeled nodes and with k edges, k=0..binomial(n+1,2).

A060517

Triangle T(n,k) of series-reduced (or homeomorphically irreducible) graphs with loops on n labeled nodes and with k edges, k=0..binomial(n+1,2).

Terms

    a(0) =1a(1) =1a(2) =0a(3) =1a(4) =1a(5) =2a(6) =1a(7) =1a(8) =3a(9) =6a(10) =6a(11) =6a(12) =3a(13) =1a(14) =1a(15) =6a(16) =15a(17) =34a(18) =58a(19) =60a(20) =60a(21) =50a(22) =33a(23) =10a(24) =1a(25) =1a(26) =10a(27) =35a(28) =120a(29) =265

External references