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 A269484 #6 Feb 28 2016 08:00:56 %S A269484 0,1,2,6,25,114,591,3297,19528,120670,771276,5061164,33940023, %T A269484 231727313,1606423838,11282801628,80149508517,575046400808, %U A269484 4162193219619,30362723745089,223051844463559,1648987263156225,12260761096966077,91639607518612228,688209161117787657,5191094043137862845 %N A269484 Number of trees on n nodes with 2 forbidden limbs of sizes 7 and 8. %C A269484 This corrects the typo in A014277(10). %H A269484 T. Lu, <a href="http://dx.doi.org/10.1016/0012-365X(95)00041-T">The enumeration of trees with and without given limbs</a>, Discr. Math., 154 (1996), 153-165, Example 5. %H A269484 <a href="/index/Tra#trees">Index entries for sequences related to trees</a> %F A269484 G.f. x^9 + g014276(x) -3*g014276(x)^2/2 +g014276(x^2)/2, where g014276 is the o.g.f. of A014276. %Y A269484 Cf. A014276. %K A269484 nonn %O A269484 0,3 %A A269484 _R. J. Mathar_, Feb 27 2016