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 A242576 #28 Jun 16 2025 08:40:36
%S A242576 13,151,277,36313,225949,7129366889,933784181621,
%T A242576 19397107178326126131136629644898891137047,
%U A242576 401151570474397232184569825031979125080583558010764826781295643008140597581801
%N A242576 Prime terms in A214828.
%C A242576 a(10) has 119 digits and thus is too large to display here. It corresponds to A214828(448).
%H A242576 Michel Marcus, <a href="/A242576/b242576.txt">Table of n, a(n) for n = 1..17</a>
%t A242576 a={1,6,6}; For[n=3, n<=1000, n++, sum=Plus@@a; If[PrimeQ[sum], Print[sum]]; a=RotateLeft[a]; a[[3]]=sum]
%t A242576 Select[LinearRecurrence[{1,1,1},{1,6,6},350],PrimeQ] (* _Harvey P. Dale_, Jul 21 2018 *)
%o A242576 (PARI) my(x='x+O('x^500)); select(isprime, Vec((1+5*x-x^2)/(1-x-x^2-x^3))) \\ _Michel Marcus_, Jun 16 2025
%Y A242576 Cf. A001590, A100683, A231574, A231575, A232543, A214899, A020992, A233554. A214727, A234696, A141523, A235862, A214825, A235873, A242324, A214827, A214828.
%K A242576 nonn
%O A242576 1,1
%A A242576 _Robert Price_, May 17 2014