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 A048812 #15 Dec 19 2015 13:11:03 %S A048812 1,1,2,3,6,9,17,28,48,81,140,236,405,686,1169,1984,3375,5723,9721, %T A048812 16478,27949,47354,80245,135869,230054,389304,658706,1114072,1883900, %U A048812 3184602,5382321,9094154,15362767,25946131,43811971,73964065 %N A048812 Number of rooted trees with n nodes with every leaf at height 7. %H A048812 Alois P. Heinz, <a href="/A048812/b048812.txt">Table of n, a(n) for n = 8..1000</a> %H A048812 N. J. A. Sloane, <a href="/transforms.txt">Transforms</a> %H A048812 <a href="/index/Ro#rooted">Index entries for sequences related to rooted trees</a> %F A048812 Euler transform of A048811 shifted right. %Y A048812 Cf. A048808-A048816. %Y A048812 Column k=7 of A244925. %K A048812 nonn %O A048812 8,3 %A A048812 _Christian G. Bower_, Apr 15 1999