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 A096003 #16 Jul 10 2015 23:07:18 %S A096003 4,6,14,46,58,221,445,497,1211,1561,4195,4393,6347,10717,14233,28213, %T A096003 31451,72965,119029,121603,124177,611261,632171,2003171,2012771, %U A096003 7466993,7619243,7771493,7923743,68029097,142247113,168901739 %N A096003 Smallest semiprime (A001358) which is at the end of an arithmetic progression of n semiprimes. %C A096003 a(33) <= 1320196303 (gap of 39029760). a(34) <= 1359226063 (gap of 39029760). a(35) <= 1398255823 (gap of 39029760). - _Donovan Johnson_, Jun 03 2012 %e A096003 a(3)=14 since (4,9,14) [or (6,10,14)] is an arithmetic progression of 3 semiprimes ending in 14 and 14 is the smallest semiprime with this property. %Y A096003 Cf. A001358 (semiprimes), A005115 (analog for primes). %Y A096003 For the associated gaps see A097824. %K A096003 nonn %O A096003 1,1 %A A096003 _N. J. A. Sloane_, Jul 28 2004 %E A096003 More terms from _T. D. Noe_ and _Ray Chandler_, Jul 29 2004 %E A096003 a(18)-a(20) from _Ray Chandler_, Aug 01 2004 %E A096003 More terms from _Hugo Pfoertner_, Aug 27 2004 %E A096003 a(26)-a(30) from _Hugo Pfoertner_, Sep 07 2004 %E A096003 a(31)-a(32) from _Donovan Johnson_, Jun 03 2012