A241454 Number of simple connected graphs g on n nodes with |Aut(g)| = 2.

0, 1, 1, 2, 9, 37, 317, 4098, 84602, 2933996

Offset

1,4

Links

Table of n, a(n) for n=1..10.

Travis Hoppe and Anna Petrone, Encyclopedia of Finite Graphs

T. Hoppe and A. Petrone, Integer sequence discovery from small graphs, arXiv preprint arXiv:1408.3644, 2014

T. Hoppe and A. Petrone, Integer sequence discovery from small graphs, Discr. Appl. Math. 201 (2016) 172-181.

Eric Weisstein's World of Mathematics, Graph Automorphism

Crossrefs

Cf. Values of |Aut(g)| for simple connected graphs, A124059, A241454, A241455, A241456, A241457, A241458, A241459, A241460, A241461, A241462, A241463, A241464, A241465, A241466, A241467, A241468, A241469, A241470, A241471.

Sequence in context: A218942 A218943 A122673 * A139102 A195187 A041515

Adjacent sequences: A241451 A241452 A241453 * A241455 A241456 A241457

Keyword

nonn

Author

Travis Hoppe and Anna Petrone, Apr 22 2014

Status

approved