a(n) = A134955(n) - A134955(n-1). Number of hyperforests spanning n unlabeled nodes without isolated vertices.

A144959

a(n) = A134955(n) - A134955(n-1). Number of hyperforests spanning n unlabeled nodes without isolated vertices.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =2a(4) =5a(5) =11a(6) =30a(7) =78a(8) =223a(9) =658a(10) =2026a(11) =6429a(12) =21015a(13) =70233a(14) =239360a(15) =829224a(16) =2912947a(17) =10356334a(18) =37205121a(19) =134887153a(20) =493000086a(21) =1814902409a(22) =6724595543a(23) =25061885217a(24) =93899071368a(25) =353514105817

External references