Number of unlabeled digraphs with loops (relations) on n nodes and with an odd number of arcs.

A055974

Number of unlabeled digraphs with loops (relations) on n nodes and with an odd number of arcs.

Terms

    a(0) =0a(1) =1a(2) =4a(3) =52a(4) =1504a(5) =145984a(6) =48461696a(7) =56141454464

External references