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 A173011 #2 Mar 30 2012 19:00:22 %S A173011 0,6,48,61440 %N A173011 a(1) = 0, for n >= 2; a(n) = the smallest number h such that tau(h) = A000005(h) = a(n-1) + 4. %C A173011 The next term is too large to include. %F A173011 A000005(a(n)) = a(n-1) + 4 for n >= 2. %Y A173011 Cf. A014221, A173603, A173604, A173605, A173606, A173607, A173608, A173609, A171959. %K A173011 nonn %O A173011 1,2 %A A173011 _Jaroslav Krizek_, Nov 06 2010