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 A242037 #17 Aug 19 2014 01:19:26
%S A242037 1,2,23,23,63,63,120,228,228,386,460,460,602,896,1096,1096,1416,1416,
%T A242037 1416,3158,3158,3158,3204,3438,3438,3966,3966,3966,8229,8229,8229,
%U A242037 8229,8229,8229,8229,8229,8229,8294,8593,8593,11125,11125,11559,11559,12216,13594
%N A242037 a(n) is the smallest k such that in the interval [1,k] of sequence A242034 all odd primes <= prime(n) are present.
%t A242037 lpf[n_]:=lpf[n]=First[First[FactorInteger[n]]]; (* least prime factor *)
%t A242037 A242034=Map[lpf[#-3]&,Select[Range[6,100000,2],lpf[#-1]>lpf[#-3]&](*A243937*)];
%t A242037 pos={};NestWhile[#+1&,2,(AppendTo[pos,Position[A242034,Prime[#],1,1]];!Last[pos]=={})&];
%t A242037 A242037=Rest[FoldList[Max,-Infinity,Flatten[pos]]] (* _Peter J. C. Moses_, Aug 14 2014 *)
%Y A242037 Cf. A245024, A243937, A242033, A242034, A242036.
%K A242037 nonn
%O A242037 2,2
%A A242037 _Vladimir Shevelev_, Aug 12 2014
%E A242037 More terms from _Peter J. C. Moses_, Aug 12 2014