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 A242325 #7 May 10 2014 23:32:59
%S A242325 5,5,11,37,127,233,1451,4909,9029,16607,103333,37314473023,
%T A242325 232180447061,2657194941637,13356042204482014297297131147848321,
%U A242325 4717604056747741831285902446873182186115052544834224581062711115537322612895948580479
%N A242325 Prime terms in the tribonacci-like sequence A214827.
%C A242325 a(17) is too large to display here having 133 digits. It corresponds to A214827(501).
%t A242325 a={1,5,5}; Print[5]; Print[5]; For[n=3, n<=1000, n++, sum=Plus@@a; If[PrimeQ[sum], Print[sum]]; a=RotateLeft[a]; a[[3]]=sum]
%Y A242325 Cf. A001590, A100683, A231574, A231575, A232543, A214899, A020992, A233554. A214727, A234696, A141523, A235862,A214825, A235873, A214827, A242324.
%K A242325 nonn
%O A242325 1,1
%A A242325 _Robert Price_, May 10 2014