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 A076656 #15 Oct 19 2017 03:14:07
%S A076656 2,7,23,71,223,673,2027,6089,18269,54829,164503,493523,1480571,
%T A076656 4441721,13325171,39975553,119926691,359780077,1079340313,3238020943,
%U A076656 9714062893,29142188683,87426566057,262279698173,786839094529
%N A076656 a(1) = 2; a(n) is smallest prime > 3*a(n-1).
%H A076656 Harvey P. Dale, <a href="/A076656/b076656.txt">Table of n, a(n) for n = 1..1000</a>
%t A076656 PrimeNext[n_]:=Module[{k},k=n+1;While[ !PrimeQ[k],k++ ];k]; p=2;lst={p};Do[p=PrimeNext[3*p];AppendTo[lst,p],{n,2*4!}];lst (* _Vladimir Joseph Stephan Orlovsky_, May 27 2009 *)
%t A076656 NestList[NextPrime[3#]&,2,30] (* _Harvey P. Dale_, Aug 12 2016 *)
%Y A076656 Cf. A055496.
%K A076656 nonn
%O A076656 1,1
%A A076656 _Cino Hilliard_, Oct 24 2002
%E A076656 Edited by _Don Reble_, May 03 2006