OFFSET
1,5
LINKS
Brendan McKay, Isoclasses of simple graphs
MATHEMATICA
(* This assumes you have Brendan McKay's files listing isoclasses of simple graphs (see link), and starts from a(2), as there is no graph1.g6 *)
Table[
Length@ Select[
Import["graph" <> ToString[i] <> ".g6"],
Function[g,
! AnyTrue[GroupElements[GraphAutomorphismGroup[g]],
Apply[Times, (-1)^(Length /@ First[#] - 1)] == -1 &]
]
],
{i, 2, 9}
]
CROSSREFS
KEYWORD
nonn
AUTHOR
Mariano Suárez-Álvarez, Jan 12 2017
EXTENSIONS
More terms from Ira M. Gessel, May 30 2019
STATUS
approved