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 A070331 #9 Nov 13 2021 08:34:31 %S A070331 1,2,3,4,5,6,7,8,9,10,12,14,15,16,18,20,21,22,23,24,25,26,27,28,29,30, %T A070331 31,32,33,34,35,36,38,39,40,42,43,44,45,46,47,48,50,51,52,54,55,56,57, %U A070331 58,60,62,63,64,65,66,68,69,70,72,73,74,75,76,77,78,80,81,82,83,84,85 %N A070331 Numbers in which suffixing or inserting a 0 anywhere yields only composite numbers. %Y A070331 Cf. A002808, A070330. %K A070331 base,nonn %O A070331 1,2 %A A070331 _Amarnath Murthy_, May 11 2002 %E A070331 More terms from _Sascha Kurz_, Jan 04 2003