1,7

Interestingly (and perhaps obviously?), For n > 2, a(n) = A124059(n-1).

1

Table of n, a(n) for n=1..11.

Eric Weisstein's World of Mathematics, Graph Automorphism

Eric Weisstein's World of Mathematics, Identity Graph

a(n) = A003400(n) - A124059(n).

For n > 2, a(n) = A124059(n-1) (conjectured; perhaps provable/obvious?).

Cf. A003400 (not-necessarily connected simple asymmetric graphs).

Cf. A124059 (connected simple asymmetric graphs).

Sequence in context: A061899 A134492 A067421 * A124059 A052764 A024284

Adjacent sequences: A275864 A275865 A275866 * A275868 A275869 A275870

nonn

Eric W. Weisstein, May 19 2017

approved