cp's OEIS Frontend

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.

A087728 Table read by rows where i-th row consists of primes P of the form P=(j*P(i)#)^2 +1 with 0 < j < P(i+1). Here P(i)# = A002110(i).

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%I A087728 #8 Oct 12 2013 15:14:05
%S A087728 5,17,37,577,8101,14401,22501,32401,44101,176401,5336101,48024901,
%T A087728 85377601,341510401,533610001,129859329601,12770402544901,
%U A087728 16679709446401,94083986096101,6021375110150401,11384162317628101
%N A087728 Table read by rows where i-th row consists of primes P of the form P=(j*P(i)#)^2 +1 with 0 < j < P(i+1). Here P(i)# = A002110(i).
%e A087728 Table begins:
%e A087728 5,17,
%e A087728 37,577,
%e A087728 8101,14401,22501,32401,
%e A087728 44101,176401,
%e A087728 5336101,48024901,85377601,341510401,533610001,
%e A087728 129859329601,
%e A087728 12770402544901,16679709446401
%o A087728 (PARI) {for(i=1,8, p=prod(j=1,i, prime(j)); for(j=1, prime(i+1)-1, c=(j*p)^2+1; if(isprime(c),print1(c ",")); ););}
%Y A087728 Cf. A087714-A087716.
%K A087728 nonn,tabf
%O A087728 0,1
%A A087728 _Pierre CAMI_, Sep 30 2003
%E A087728 Edited by _Ray Chandler_, Sep 30 2003