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.

A155012 Fibonacci prime numbers f, 3*f+2 are also primes.

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%I A155012 #7 Nov 05 2015 10:35:08
%S A155012 3,5,13,89,233,1597,514229,99194853094755497,
%T A155012 19134702400093278081449423917
%N A155012 Fibonacci prime numbers f, 3*f+2 are also primes.
%C A155012 3*3+2=11, 3*5+2=17, 3*13+2=41, ...
%t A155012 a={};Do[f=Fibonacci[n];If[PrimeQ[f],If[PrimeQ[3*f+2],AppendTo[a,f]]],{n,4*6!}];a
%o A155012 (Python)
%o A155012 from gmpy2 import is_prime
%o A155012 A155012_list = []
%o A155012 a, b, a2, b2 = 0, 1, 2, 5
%o A155012 for _ in range(10**3):
%o A155012     if is_prime(b) and is_prime(b2):
%o A155012         A155012_list.append(b)
%o A155012     a, b, a2, b2 = b, a+b, b2, a2+b2-2 # _Chai Wah Wu_, Nov 04 2015
%Y A155012 Cf. A005478, A000045, A005384, A155011
%K A155012 nonn
%O A155012 1,1
%A A155012 _Vladimir Joseph Stephan Orlovsky_, Jan 18 2009