Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #7 Jan 09 2020 19:27:20
%S 1,2,6,21,82,356,1690,8731,48213,281885,1724817,10955956,71747613,
%T 481927039,3306721747,23103546417,163954719933,1179368199427,
%U 8584854507319,63150696347462,468906907743356,3511055861792836,26489459993078577,201226384388401603
%N Number of unlabeled bicolored acyclic graphs with n nodes of each color.
%C The two color classes are not interchangeable. Adjacent nodes cannot have the same color.
%H Andrew Howroyd, <a href="/A329055/b329055.txt">Table of n, a(n) for n = 0..100</a>
%Y Main diagonal of A329052.
%K nonn
%O 0,2
%A _Andrew Howroyd_, Nov 02 2019