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 A024452 #6 Sep 23 2016 08:22:23
%S A024452 1,3,5,10,15,23,31,42,55,69,86,105,125,148,173,200,230,262,296,331,
%T A024452 369,409,452,498,547,597,649,702,757,819,883,950,1017,1090,1164,1240,
%U A024452 1320,1402,1487,1574,1663,1757,1851,1948
%N A024452 a(n) = [ (2nd elementary symmetric function of P(n))/(first elementary symmetric function of P(n)) ], where P(n) = {first n+1 primes}.
%Y A024452 Cf. A024447, A007504.
%K A024452 nonn
%O A024452 1,2
%A A024452 _Clark Kimberling_