Number of different configurations of cycles (loops) in graphs containing directed and undirected links.

A117747

Number of different configurations of cycles (loops) in graphs containing directed and undirected links.

Terms

    a(0) =7a(1) =15a(2) =30a(3) =74a(4) =171a(5) =444a(6) =1138a(7) =3048a(8) =8175a(9) =22427a(10) =61686a(11) =171630a(12) =479411a(13) =1347609a(14) =3801522a(15) =10768832a(16) =30595671a(17) =87190791a(18) =249085662a(19) =713268978a(20) =2046679419a(21) =5884137206a(22) =16946037930a(23) =48882597264a(24) =141215566135a(25) =408515830803

External references