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 A230202 #12 Aug 16 2024 06:02:58 %S A230202 1999,2999,4999,8999,13999,25999,32999,35999,41999,49999,52999,56999, %T A230202 59999,70999,71999,73999,77999,79999,85999,94999,98999,100999,101999, %U A230202 104999,107999,133999,134999,136999,137999,139999,143999,157999,161999,164999,172999,179999 %N A230202 Primes that end in 999. %C A230202 37 does not divide a(n) - 999 for any n because 37 divides 999 and a(n) is prime. The sequence is infinite. %D A230202 Joseph B. Dence and Thomas P. Dence, Elements of the Theory of Numbers, Academic Press, San Diego, 1999, p. 35. %o A230202 (Magma) [p : p in PrimesUpTo(18*10^4) | p mod 1000 eq 999]; %o A230202 (Magma) [n : n in [999..18*10^4 by 1000] | IsPrime(n)]; %Y A230202 Subsequence of A167292. %K A230202 nonn,base %O A230202 1,1 %A A230202 _Arkadiusz Wesolowski_, Oct 11 2013