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 A156621 #2 Mar 30 2012 17:36:44 %S A156621 1442399,8993999,16007999,18258527,25090079,51136799,71690087, %T A156621 95433359,108722327,119617967,136913399,141538607,144264119,146724767, %U A156621 151856327,177928919,187169759,198443567,212080967,230644967,233386727,249924479 %N A156621 5-almost primes of the form p^2 - 2, where p is prime. %C A156621 Corresponding primes are A156620. %C A156621 This sequence is infinite: See A156620 for comments and references. %o A156621 (PARI) forprime(p=2, prime(2500), ap=p^2-2; if(bigomega(ap)==5, print1(ap,", "))) %Y A156621 Cf. A156620, A014614. %K A156621 nonn %O A156621 1,1 %A A156621 _Rick L. Shepherd_, Feb 11 2009