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 A153242 #4 Mar 31 2012 13:21:17 %S A153242 0,2,4,5,6,9,10,11,12,13,14,15,16,19,23,24,25,26,27,28,29,30,31,32,33, %T A153242 34,35,36,37,38,39,40,41,42,43,44,47,51,52,53,56,60,65,66,67,68,69,70, %U A153242 71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93 %N A153242 Positions of general trees in A014486 whose degree is not one. %H A153242 A. Karttunen, <a href="/A153242/b153242.txt">Table of n, a(n) for n = 0..1000</a> %Y A153242 I.e. such i that A057515(i) is not 1. Complement of A057548. For n>0, gives the indices of trees whose degree is greater than one. (At least two top-level branches). %K A153242 nonn %O A153242 0,2 %A A153242 _Antti Karttunen_, Dec 21 2008