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 A207637 #9 Jun 14 2013 15:59:07
%S A207637 10,15,23,31,41,59,71,83,97,109,131,143,159,173,187,199,211,223,235,
%T A207637 251,269,287,301,311,319,329,349,371,395,407,439,457,471,487,503,519,
%U A207637 533,551,565,581,589,607,633,661,679,689,701,713,731,749,771,789,803
%N A207637 Squarefree sums of 3 successive primes.
%H A207637 Vincenzo Librandi, <a href="/A207637/b207637.txt">Table of n, a(n) for n = 1..1000</a>
%t A207637 Select[Table[Prime[n] + Prime[n + 1] + Prime[n + 2], {n, 300}], SquareFreeQ]
%o A207637 (PARI) p=2;q=3;forprime(r=5,1e4,if(issquarefree(t=p+q+r),print1(t", "));p=q;q=r) \\ _Charles R Greathouse IV_, Jun 14 2013
%Y A207637 Cf. A206329.
%K A207637 nonn,easy
%O A207637 1,1
%A A207637 _Vladimir Joseph Stephan Orlovsky_, Feb 19 2012