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 A226068 #11 Jun 19 2019 21:04:49
%S A226068 0,0,0,0,0,0,0,16,16,36,36,36,36,64,64,96,96,96,96,136,136,136,136,
%T A226068 136,136,188,188,188,188,188,188,188,188,256,256,256,256,256,256,336,
%U A226068 336,336,336,424,424,424,424,424
%N A226068 The sum of the positive integers not exceeding 2n that are representable as the sum of two successive sexy primes.
%C A226068 4 divides a(n) for n > 0.
%F A226068 a(n) = 2*Sum_{i=1..n} i * (pi(i-3) - pi(i-4)) * (pi(i+3) - pi(i+2)), where pi is the prime counting function (A000720).
%F A226068 a(n) = Sum_{i=1..2*n} c(i), where c is the characteristic function of A104010. - _R. J. Mathar_, May 28 2013
%p A226068 with(numtheory); A226068:=n->sum( 2*i*(pi(i-3) - pi(i-4)) * (pi(i+3) - pi(i+2)) , i = 1..n);
%p A226068 seq(A226068(k), k = 1..70);
%Y A226068 Cf. A000720, A104010, A098428.
%K A226068 nonn
%O A226068 1,8
%A A226068 _Wesley Ivan Hurt_, May 24 2013