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 A361898 #10 Apr 22 2023 19:30:06 %S A361898 3,5,7,11,31,73,97,151,241,631,673,1321,23311 %N A361898 A set of 13 primes that form a covering set for a Sierpiński (or Riesel) number. %C A361898 A set of primes is called the covering set for the Sierpiński number k if for every positive integer m there is at least one prime in the set which divides k*2^m + 1. Similarly, a set of primes is called the covering set for the Riesel number j if for every positive integer m there is at least one prime in the set which divides j*2^m - 1. %Y A361898 Subset of A296924. %Y A361898 Cf. A076336, A101036, A291360, A361899, A361900. %K A361898 nonn,fini,full %O A361898 1,1 %A A361898 _Arkadiusz Wesolowski_, Mar 28 2023