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 A173604 #2 Mar 30 2012 19:00:22 %S A173604 1,6,36,36864 %N A173604 a(1) = 1, for n >= 2; a(n) = the smallest number h such that tau(h) = A000005(h) = a(n-1) + 3. %C A173604 The next term is too large to include. %F A173604 A000005(a(n)) = a(n-1) + 3 for n >= 2. %Y A173604 Cf. A014221, A173603, A173605, A173606, A173607, A173608, A173609, A171959, A173011. %K A173604 nonn %O A173604 1,2 %A A173604 _Jaroslav Krizek_, Nov 06 2010