

A283420


Number of simple (not necessarily connected) untraceable graphs on n nodes.


18



0, 1, 2, 6, 16, 65, 310, 2316, 26241, 522596, 18766354
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OFFSET

1,3


LINKS



FORMULA



CROSSREFS

Cf. A000088 (number of simple graphs on n vertices).
Cf. A057864 (number of simple traceable graphs on n vertices).
Cf. A283421 (number of simple connected untraceable graphs on n vertices).
The directed case is A326224 (with loops).
Unlabeled simple graphs not containing a Hamiltonian cycle are A246446.


KEYWORD

nonn,more


AUTHOR



STATUS

approved



