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 A227010 #11 Jul 01 2013 18:30:12 %S A227010 10,14,15,18,20,21,25,26,27,28,35,36,37,39,40,42,49,50,52,56,63,64,65, %T A227010 67,72,74,79,80,84,91,96,100,101,104,109,111,112,125,127,128,144,168, %U A227010 181,185,192,200,211,224,256,269,281,288,293,307,336,353,379 %N A227010 Places n where A225867(n) = 4. %C A227010 Note that the proportion of prime terms has a tendency to increase. For example, %C A227010 1 from the first 20 terms; 6 from the first 40 terms; 16 from the first 60 terms; 34 from the first 80 terms; 53 from the first 100 terms; 90 from the first 140 terms. We conjecture that this proportion asymptotically tends to 1. %Y A227010 Cf. A225867, A225868, A226977. %K A227010 nonn %O A227010 1,1 %A A227010 _Vladimir Shevelev_, Jun 27 2013