A361410 Number of cubic graphs on 2n unlabeled vertices rooted at a vertex.
0, 1, 2, 11, 68, 510, 4712, 51877, 664520, 9662968, 156490473, 2783955994, 53863486240, 1124886942314, 25206326633070, 603048386506505, 15339533779133582, 413338072569232815, 11760801736217845686, 352342902996056683824
Offset: 1