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 A245102 #8 Jul 12 2014 03:42:13 %S A245102 0,1,2,8,36,180,941,5079,27961,156129,880883,5009625,28668920, %T A245102 164897622,952418882,5520254925,32090787577,187030223470, %U A245102 1092467751427,6393706661582,37484034980109,220093799592140,1294100839792723,7618482099893824,44901233075819275 %N A245102 Number of 2n-node rooted trees of height n. %H A245102 Alois P. Heinz, <a href="/A245102/b245102.txt">Table of n, a(n) for n = 0..200</a> %F A245102 a(n) = A034781(2n,n). %F A245102 a(n) ~ c * d^n / sqrt(n), where d = 6.0313827950978605329935..., c = 0.03944957121899527... . - _Vaclav Kotesovec_, Jul 12 2014 %Y A245102 Cf. A034781. %K A245102 nonn %O A245102 0,3 %A A245102 _Alois P. Heinz_, Jul 11 2014