A075096 Number of simple graphs g on n nodes with |Aut(g)| = 4.

0, 0, 0, 2, 6, 36, 248, 2264, 31754, 710574, 26501530, 1712953820

Offset

1,4

Links

Table of n, a(n) for n=1..12.

Zoran Maksimovic, Number of graphs on n nodes whose automorphism group orders are k, n<=11

Eric Weisstein's World of Mathematics, Graph Automorphism

Crossrefs

Cf. A003400, A075095, A075097, A075098.

Sequence in context: A052832 A058583 A345747 * A347897 A354413 A177373

Adjacent sequences: A075093 A075094 A075095 * A075097 A075098 A075099

Keyword

nonn,hard,more

Author

Eric W. Weisstein, Aug 31 2002

Extensions

a(8)-a(9) from Eric W. Weisstein, Jun 09 2004

a(10)-a(11) from Maksimovic's preprint added by Max Alekseyev, Apr 26 2010

a(12) from Sean A. Irvine, Feb 09 2025

Status

approved