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 A173609 #2 Mar 30 2012 19:00:22 %S A173609 0,2,6,24,12288 %N A173609 a(1) = 0, for n >= 2; a(n) = the smallest number h such that tau(h) = A000005(h) = a(n-1) + 2. %C A173609 The next term is too large to include. %F A173609 A000005(a(n)) = a(n-1) + 2 for n >= 2. %Y A173609 Cf. A014221, A173603, A173604, A173605, A173606, A173607, A173608, A171959, A173011. %K A173609 nonn %O A173609 1,2 %A A173609 _Jaroslav Krizek_, Nov 06 2010