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 A087196 #3 Mar 30 2012 18:50:38 %S A087196 7,13,31,37,97,109,151,193,307,751,769,1453,1723,2917,3541,5113,8011, %T A087196 10303,12289,12697,15973,17293,28057,30103,86143,106033,147073,151687, %U A087196 362953,459007,492103,552793,579883,598303,684757,704761,712891 %N A087196 Primes of the form 1+(1+p)*p^e, p prime and e>0. %e A087196 p=2, e=12: 1+(1+A000040(1))*A000040(1)^12 = 1+(1+2)*2^12 = 1+3*128 = 12289 = A000040(1470), therefore 12289 is a term: a(19)=A087195(54)=12289; %e A087196 p=23, e=2: 1+(1+A000040(9))*A000040(9)^2 = 1+(1+23)*23^2 = 1+24*529 = 12697 = A000040(1516), therefore 12697 is a term: a(20)=A087195(55)=12697. %Y A087196 Cf. A087195. %K A087196 nonn %O A087196 1,1 %A A087196 _Reinhard Zumkeller_, Aug 24 2003