Number of simple unlabeled graphs on n nodes with exactly 7 connected components that are trees or cycles.

A215987

Number of simple unlabeled graphs on n nodes with exactly 7 connected components that are trees or cycles.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =6a(4) =13a(5) =26a(6) =56a(7) =115a(8) =246a(9) =530a(10) =1166a(11) =2613a(12) =5982a(13) =13940a(14) =33073a(15) =79760a(16) =195109a(17) =483615a(18) =1212485a(19) =3071358a(20) =7850690a(21) =20231286a(22) =52513864a(23) =137202595a(24) =360578812a(25) =952705531a(26) =2529454122a(27) =6745724961a(28) =18063628118a(29) =48553319703

External references