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 A105322 #16 Sep 08 2022 08:45:17
%S A105322 73,7993,799993,7999993,79999999993,7999999999993,79999999999993,
%T A105322 7999999999999999999999999999999999999993,
%U A105322 7999999999999999999999999999999999999999999999993
%N A105322 Primes of the form 8*10^n-7.
%C A105322 This sequence is a subsequence of A104907 also is a subsequence of A105324(see A104907 and A105324).
%H A105322 Vincenzo Librandi, <a href="/A105322/b105322.txt">Table of n, a(n) for n = 1..16</a>
%H A105322 Makoto Kamada, <a href="https://stdkmd.net/nrr/7/79993.htm#prime">Prime numbers of the form 799...993</a>.
%F A105322 a(n) = 8*A099190(n) - 7.
%e A105322 7993 is in the sequence because 7993=8*10^3-7 and 7993 is prime.
%t A105322 Do[If[PrimeQ[8*10^n - 7], Print[8*10^n - 7]], {n, 60}]
%t A105322 Select[Table[8*10^n-7,{n,0,80}],PrimeQ] (* _Vincenzo Librandi_, Jul 19 2012 *)
%o A105322 (Magma) [ a: n in [0..50] | IsPrime(a) where a is 8*10^n-7 ]; // _Vincenzo Librandi_, Jul 19 2012
%Y A105322 Cf. A099190, A104907, A105324.
%K A105322 nonn,easy
%O A105322 1,1
%A A105322 _Farideh Firoozbakht_, Apr 16 2005