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 A247027 #8 Sep 26 2014 21:13:56
%S A247027 5,7,12,19,47,97,124,244,564,1037,12007,13662,180039
%N A247027 Indices of primes in the tetranacci sequence A001631.
%C A247027 a(14) > 2*10^5.
%H A247027 Tony D. Noe and Jonathan Vos Post, <a href="http://www.cs.uwaterloo.ca/journals/JIS/VOL8/Noe/noe5.html">Primes in Fibonacci n-step and Lucas n-step Sequences</a>, J. of Integer Sequences, Vol. 8 (2005), Article 05.4.4
%t A247027 a={0,0,1,0}; For[n=4, n<=1000, n++, sum=Plus@@a; If[PrimeQ[sum], Print[n]]; a=RotateLeft[a]; a[[4]]=sum]
%Y A247027 Cf. A001590, A001631, A100683, A231574, A231575, A232542, A214899, A230607, A020992, A232498, A214727, A081172, A214752, A141523,A214825, A235862.
%K A247027 nonn,more
%O A247027 1,1
%A A247027 _Robert Price_, Sep 09 2014