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 A095995 #8 Sep 08 2022 08:45:14
%S A095995 199,499,599,1399,1499,1699,1999,2099,2399,2699,2999,3299,3499,4099,
%T A095995 4799,4999,5099,5399,6199,6299,6599,6899,7499,7699,8599,8699,8999,
%U A095995 9199,10099,10399,10499,10799,11299,11399,11699,12799,12899,13099,13399
%N A095995 Primes of the form 100n - 1.
%C A095995 If n is of the form 3x + 1 then 100n - 1 will be of the form 100*3x + 99, that is, a multiple of 3. The factorizations of other nonprime 100n - 1 has a much more complicated pattern.
%H A095995 Vincenzo Librandi, <a href="/A095995/b095995.txt">Table of n, a(n) for n = 1..1000</a>
%e A095995 a(2)=499 because 499 = 100 * 5 - 1.
%t A095995 Select[ 100Range[134] - 1, PrimeQ[ # ] &]
%t A095995 Select[Table[100n-1,{n,0,800}],PrimeQ] (* _Vincenzo Librandi_, Jul 17 2012 *)
%o A095995 (Magma) [a: n in [0..135] | IsPrime(a) where a is 100*n-1]; // _Vincenzo Librandi_, Jul 17 2012
%Y A095995 Cf. A062800.
%K A095995 nonn,easy
%O A095995 1,1
%A A095995 _Alonso del Arte_, Jul 19 2004
%E A095995 Edited by _Robert G. Wilson v_, Jul 23 2004