Number of unlabeled rooted nonseparable graphs with n nodes.

A004115

Number of unlabeled rooted nonseparable graphs with n nodes.

Terms

    a(0) =0a(1) =1a(2) =1a(3) =4a(4) =22a(5) =178a(6) =2278a(7) =46380a(8) =1578060a(9) =92765486a(10) =9676866173

External references