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 A136443 #6 Apr 23 2015 08:44:50
%S A136443 1,3,5,7,8,9,10,11,13,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,
%T A136443 31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,
%U A136443 54,55,56,57,58,59,61,62,63,65,66,67,68,69,70,71,72,73,74,75,76,77,78
%N A136443 Numbers m such that A102863(m) = 1.
%C A136443 Except first term, numbers n such that the sum of the first n primes is composite: Essentially the complement of A013916.
%t A136443 Join[{1},Flatten[Position[Accumulate[Prime[Range[80]]],_?CompositeQ]]] (* _Harvey P. Dale_, Apr 23 2015 *)
%Y A136443 Cf. A013916, A102863.
%K A136443 nonn
%O A136443 1,2
%A A136443 _Giovanni Teofilatto_, Apr 03 2008