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 A226484 #5 Jun 09 2013 08:38:31
%S A226484 1,3,5,7,9,11,13,21,27,33,37,45,51,61,127,351
%N A226484 Odd numbers not of the form p + q^2 + r^3 with p, q, and r prime.
%C A226484 There are no more terms < 10^11.
%t A226484 pp[n_] := Prime@ Range@ PrimePi@ n; upto[n_] := Complement[Range[1, n, 2],
%t A226484 Flatten@Table[ q^2 + r^3 + pp[n - q^2 - r^3], {r, pp[n^(1/3)]}, {q, pp@Sqrt[n - r^3]}]]; upto[10^4]
%Y A226484 Cf. A212292.
%K A226484 nonn,hard,more
%O A226484 1,2
%A A226484 _Giovanni Resta_, Jun 09 2013