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%I #19 Apr 03 2020 17:25:42
%S 0,0,1,1,2,6,14,41,157,725,4196,29817,246646,2297088,23503564,
%T 260265650,3090341095,39101587595,524783295041,7443251159470,
%U 111222017297268,1746166043555813,28734210790531045,494526547845483641,8883866458982018870,166286444108288113541,3237719185652343485853,65477290060076644381373
%N Number of simple regular trivalent bicolored graphs with 2n nodes.
%H Sean A. Irvine, <a href="/A004066/a004066.png">On the difference between A004066 and A008325</a>
%F a(n) = (A000840(n) + A000512(n))/2. - _Andrew Howroyd_, Apr 01 2020
%Y Cf. A000512, A000840, A008325 (bipartite), A006823 (connected).
%K nonn
%O 1,5
%A _Gunnar Brinkmann_, _Brendan McKay_ and Eric Rogoyski
%E a(1)-a(2) prepended and terms a(15) and beyond from _Andrew Howroyd_, Apr 01 2020
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