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 A236515 #22 Mar 05 2014 00:03:38
%S A236515 1,2,2,3,2,4,2,5,3,4,2,6,2,4,4,8,2,5,2,6,4,4,2,9,3,4,5,6,2,7,2,13,4,4,
%T A236515 4,10,2,4,4,9,2,7,2,6,6,4,2,14,3,5,4,6,2,8,4,9,4,4,2,11,2,4,6,20,4,7,
%U A236515 2,6,4,7,2,15,2,4,5,6,4,7,2,14,8,4,2,11,4,4,4,9,2,10,4,6,4,4,4,21,2,5,6,10
%N A236515 Colexicographic index of prime signature of n.
%C A236515 Index of prime signature of n when prime signatures are listed in colexicographic order (see A036037).
%H A236515 OEIS Wiki, <a href="http://oeis.org/wiki/Orderings_of_prime_signatures">Orderings of prime signature</a>
%e A236515 a(7) = a({1}) = 2, a(180) = a({2,2,1}) = 17, a(216) = a({3,3}) = 23
%e A236515 =====================================================================
%e A236515 a(1) = 1,
%e A236515 For all n in A000040, prime_signature(n) = {1}, a(n) = 2,
%e A236515 For all n in A001248, prime_signature(n) = {2}, a(n) = 3,
%e A236515 For all n in A006881, prime_signature(n) = {1,1}, a(n) = 4,
%e A236515 For all n in A030078, prime_signature(n) = {3}, a(n) = 5,
%e A236515 For all n in A054753, prime_signature(n) = {2,1}, a(n) = 6,
%e A236515 For all n in A007304, prime_signature(n) = {1,1,1}, a(n) = 7, etc.
%Y A236515 Cf. A036037, A124010, A237433.
%K A236515 nonn
%O A236515 1,2
%A A236515 _Sung-Hyuk Cha_, Jan 27 2014