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.

A162250 Values of the form prime(prime(i)) with a prime digital sum.

This page as a plain text file.
%I A162250 #5 Oct 01 2013 21:35:30
%S A162250 3,5,11,41,67,83,157,179,191,241,283,331,353,401,461,599,739,773,797,
%T A162250 919,991,1031,1217,1297,1433,1471,1499,1523,1723,1741,1787,2027,2063,
%U A162250 2081,2221,2269,2351,2609,2647,2683,2719,2803,3019,3109,3169,3259,3299
%N A162250 Values of the form prime(prime(i)) with a prime digital sum.
%F A162250 {A006450(i) : A007953(A006450(i)) in A000040}. [From _R. J. Mathar_, Aug 03 2009]
%e A162250 Prime(prime(6)) = 41. 4+1=5, prime. So 41 is in the sequence.
%o A162250 (PARI) sodip(n) = {
%o A162250 local(s=0,a,x,y,j,p);
%o A162250 for(x=1,n, p=prime(prime(x)); a=eval(Vec(Str(p))); y=sum(j=1,length(a),a[j]); if(isprime(y),print1(p","));)
%o A162250 }
%Y A162250 Intersection of A006450 and A028834.
%K A162250 nonn,base
%O A162250 1,1
%A A162250 _Cino Hilliard_, Jun 28 2009
%E A162250 Definition rephrased by _R. J. Mathar_, Sep 11 2009