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 A032733 #9 Aug 13 2024 11:56:11 %S A032733 0,2,3,5,17,20,21,26,32,36,38,41,42,53,59,60,62,66,68,69,71,77,81,83, %T A032733 84,92,96,99,101,104,111,119,123,129,134,135,140,143,150,155,156,161, %U A032733 162,164,168,174,176,179,183,186,189,191,192,200,203,212,213,218,221 %N A032733 Numbers k such that k prefixed by '8' and followed by '9' is prime. %Y A032733 Cf. A032702-A032732. %K A032733 nonn,base %O A032733 1,2 %A A032733 _Patrick De Geest_, May 15 1998