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 A147670 #13 Aug 03 2025 13:52:28
%S A147670 1273609,6612607849,2019169299698041,151522599154859354635552921,
%T A147670 9745744932248196392577951049,
%U A147670 220850092209355591999793321040563526382178219220559368038951319096656329
%N A147670 Primes of the form 8^k-7^k.
%C A147670 The next term (a(7)) has 103 digits. - _Harvey P. Dale_, Jul 05 2023
%e A147670 8^7-7^7 = 2097152-823543 = 1273609.
%t A147670 lst={};Do[p=8^n-7^n;If[PrimeQ[p],AppendTo[lst,p]],{n,6!}];lst
%t A147670 Select[Table[8^n-7^n,{n,100}],PrimeQ] (* _Harvey P. Dale_, Jul 05 2023 *)
%Y A147670 Cf. A016177, A062574.
%K A147670 nonn
%O A147670 1,1
%A A147670 _Vladimir Joseph Stephan Orlovsky_, Nov 10 2008