This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A294728 #10 Nov 08 2017 02:26:35 %S A294728 0,0,0,1,1,6,7,37,47,242,324,1658,2300,11764,16741,85741,124383, %T A294728 638250,939880,4832446,7202214,37101556,55842670,288180066,437325262, %U A294728 2260516372,3454370352,17881862308,27489383818,142491830992,220185726817 %N A294728 Number of Q graphs with 2*n vertices symmetrical about a distinguished edge. %H A294728 R. C. Read, <a href="http://dx.doi.org/10.1007/BF02188172">On the enumeration of a class of plane multigraphs</a>, Aequat. Math. 31 (1986) no 1, 47-63. %F A294728 G.f.: H(x) * (B(x^2) - x^2) where H(x) is the g.f. for A007165 and B(x) is the g.f. for A003168. %Y A294728 Cf. A003168, A007165. %K A294728 nonn %O A294728 1,6 %A A294728 _Sean A. Irvine_, Nov 07 2017