Number of weakly connected digraphs on n unlabeled nodes that are not strongly connected.

A056988

Number of weakly connected digraphs on n unlabeled nodes that are not strongly connected.

Terms

    a(0) =0a(1) =1a(2) =8a(3) =116a(4) =4316a(5) =483835a(6) =175048780a(7) =212125583518

External references