OFFSET
1,3
LINKS
Ali Sltan Ali AL-Tarimshawy, J. Siemons, Singular Graphs with Dihedral Group Action, arXiv:2006.12875 [math.CO], 2020.
MATHEMATICA
k = {}; For[i = 1, i < 8, i++, lg = ListGraphs[i] ; len = Length[lg]; k = Append[k, Length[Select[Range[len], Det[ToAdjacencyMatrix[lg[[ # ]]]] == 0 &]]]]; k
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Tanya Khovanova, Aug 27 2008
STATUS
approved