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 A188542 #8 Mar 30 2012 17:35:24 %S A188542 1,1,1,2,1,1,3,1,2,3,2,3,2,4,4,4,3,5,5,4,4,7,4,4,8,7,6,5,6,5,4,6,6,5, %T A188542 6,9,5,5,5,7,9,7,5,7,12,8,8,12,7,8,13,10,10,9,10,7,11,11,11,6,5,11,13, %U A188542 12,8,8,14,9,5,7,5,14,12,13,8,11,15,15,12,11,5,11,17,14,15,15,12,15,14,16,14,17,13,15,15,12,6,17,16,14 %N A188542 Number of primes between n^3-n and n^3+n. %C A188542 We include the end points in the range; this affects the value only for n=1. %C A188542 Conjecture: the sequence contains no 0's. Verified up to n = 100000. %o A188542 (PARI) vector(100,m,sum(k=m^3-m,m^3+m,isprime(k))) %Y A188542 Cf. A110835, A000578, A007531, A034262. %K A188542 nonn %O A188542 1,4 %A A188542 _Franklin T. Adams-Watters_, Apr 07 2011