Number of connected antisymmetric relations on n unlabeled nodes.

A101460

Number of connected antisymmetric relations on n unlabeled nodes.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =32a(4) =467a(5) =15726a(6) =1283648a(7) =266995482a(8) =145658273814

External references