Triangle T(n,k) read by rows: number of series-reduced labeled graphs on n nodes with k components.

Terms

a(0) =1a(1) =1a(2) =1a(3) =0a(4) =3a(5) =1a(6) =5a(7) =3a(8) =6a(9) =1a(10) =51a(11) =25a(12) =15a(13) =10a(14) =1a(15) =3634a(16) =381a(17) =90a(18) =45a(19) =15a(20) =1a(21) =374119a(22) =26509a(23) =1596a(24) =280a(25) =105a(26) =21a(27) =1a(28) =73161880a(29) =3095579