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 A248700 #21 Dec 04 2014 20:47:07
%S A248700 8,14,22,102495,130447,173590
%N A248700 Indices of primes in the Heptanacci numbers sequence A122189.
%C A248700 a(7) > 2*10^5.
%H A248700 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 A248700 a={0,0,0,0,0,0,1}; For[n=7, n<=1000, n++, sum=Plus@@a; If[PrimeQ[sum], Print[n]]; a=RotateLeft[a]; a[[7]]=sum]
%Y A248700 Cf. A001590, A001631, A100683, A231574, A231575, A232542, A214899, A230607, A020992, A232498, A214727, A081172, A214752, A141523, A214825, A235862, A000288, A000322, A122189.
%K A248700 nonn,more
%O A248700 1,1
%A A248700 _Robert Price_, Dec 02 2014