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 A124658 #8 Jul 18 2021 06:39:56 %S A124658 5246,5888,7702,7954,9952,9974,10342,10532,11986,12176,12688,13528, %T A124658 14968,15178,15832,16766,18692,18748,18804,19106,20822,21928,22486, %U A124658 22826,22886,24260,24272,24596,24868,25678,25708,26966,27134,27146 %N A124658 Even numbers k such that if a person is born in year k and lives not more than 100 years, then he never celebrates his prime birthday on a prime year. %C A124658 For odd years, if a man is born on an odd year, his not being able to celebrate his prime birthday on a prime year is equivalent to the year of birth being an odd composite minus 2: A007921 Numbers that are not the difference of two primes. %Y A124658 Cf. A007921. %K A124658 nonn %O A124658 1,1 %A A124658 _Tanya Khovanova_, Dec 22 2006