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 A089966 #5 Mar 30 2012 18:50:42 %S A089966 1,15,33,35,45,51,69,75,85,87,99,123,135,141,143,153,159,161,175,177, %T A089966 185,207,213,225,235,245,249,259,261,267,297,303,321,323,335,339,363, %U A089966 369,375,393,405,411,423,425,447,455,459,477,485,501,519,531,533,535 %N A089966 Numbers n such that omega(n) = gpf(n) mod spf(n), where omega=A001221, gpf=A006530 and spf=A020639. %C A089966 A069859(a(n)) = A001221(a(n)); %C A089966 A064900 is a subsequence. %Y A089966 Cf. A089967. %K A089966 nonn %O A089966 1,2 %A A089966 _Reinhard Zumkeller_, Nov 17 2003