%I #20 Mar 11 2020 18:00:12
%S 0,0,0,1,1,4,12,66,433,3442,30404,294951,3093770,34846185,419020738,
%T 5355289843,72466668921,1034818990771,15548633703424,245182764121059,
%U 4047990858838185,69826392559499108,1256005988628521464,23517396850332614602,457623646061902648705
%N Number of quartic bicolored graphs on n unlabeled nodes admitting an automorphism exchanging the colors.
%Y Column k=4 of A333159.
%Y Cf. A000513, A000840.
%K nonn
%O 1,6
%A _Brendan McKay_ and Eric Rogoyski
%E a(11)-a(25) from _Andrew Howroyd_, Mar 10 2020
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