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 A146319 #4 Mar 30 2012 18:40:04 %S A146319 15,35,39,51,87,95,111,155,161,249,267,291,305,335,371,377,395,407, %T A146319 447,485,489,519,591,611,629,671,699,707,731,737,749,755,767,771,807, %U A146319 851,879,917,939,951,989,995,1007,1011,1047,1059,1067,1115,1149,1169,1191,1199,1211,1227,1247,1299,1371,1379,1457,1469,1529,1565,1655,1691,1707,1731,1739,1745,1751,1781,1799,1991 %N A146319 Squarefree semiprimes n such that n+1 is not squarefree and n+2 is prime. %F A146319 (A006881 INTERSECT A040976) INTERSECT A005117 %K A146319 easy,nonn %O A146319 1,1 %A A146319 _Giovanni Teofilatto_, Oct 30 2008 %E A146319 Definition corrected and more terms supplied by _R. J. Mathar_, Nov 02 2008