Number of isomorphism classes of connected 3-regular multigraphs with n vertices and with loops and semi-edges allowed.

A243394

Number of isomorphism classes of connected 3-regular multigraphs with n vertices and with loops and semi-edges allowed.

Terms

    a(0) =2a(1) =5a(2) =7a(3) =22a(4) =43a(5) =141a(6) =373a(7) =1270a(8) =4053a(9) =14671a(10) =52826a(11) =203289a(12) =795581a(13) =3241367a(14) =13504130a(15) =57904671a(16) =253856990a(17) =1139231977a(18) =5219113084a(19) =24401837085a(20) =116278408069a(21) =564380686932

External references