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 A114257 #5 May 25 2018 08:33:24 %S A114257 1,3,32,63,67,75,88,99,104,115,116,120,135,144,159,167,179,188,192, %T A114257 195,199,204,227,239,244,260,280,283,304,323,335,348,351,379,380,384, %U A114257 396,412,424,436,443,503,508,523,579,632,648,651,695,723,724,736,743,752 %N A114257 Numbers n such that A014285(n) is prime. %o A114257 (PARI) isok(n) = isprime(sum(i=1, n, i*prime(i))); \\ _Michel Marcus_, May 25 2018 %Y A114257 Cf. A014285 (Sum i*prime(i); i=1..n), A114256 (Prime numbers in A014285). %K A114257 nonn %O A114257 1,2 %A A114257 _Zak Seidov_, Nov 18 2005