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 A173605 #2 Mar 30 2012 19:00:22 %S A173605 1,16,240,17293822569102704640 %N A173605 a(1) = 1, for n >= 2; a(n) = the smallest number h such that tau(h) = A000005(h) = a(n-1) + 4. %C A173605 The next term is too large to include. %F A173605 A000005(a(n)) = a(n-1) + 4 for n >= 2. %Y A173605 Cf. A014221, A173603, A173604, A173606, A173607, A173608, A173609, A171959, A173011. %K A173605 nonn %O A173605 1,2 %A A173605 _Jaroslav Krizek_, Nov 06 2010