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 A070330 #19 Jun 09 2024 00:14:41 %S A070330 1,7,23,29,31,43,47,73,77,83,91,101,103,107,127,143,157,173,199,209, %T A070330 221,233,241,247,251,257,259,271,307,313,317,343,353,359,373,377,391, %U A070330 409,431,433,437,439,443,461,467,469,487,497,527,541,563,569,583,589,601 %N A070330 Nontrivial numbers in which suffixing or inserting a 0 anywhere yields only composite numbers. %C A070330 "Nontrivial" excludes multiples of 2, 3, or 5. %Y A070330 Cf. A002808, A070331. %Y A070330 Cf. A008585, A005843, A017329. %K A070330 base,nonn %O A070330 1,2 %A A070330 _Amarnath Murthy_, May 11 2002 %E A070330 More terms from _Sascha Kurz_, Feb 01 2003 %E A070330 a(1)=1 inserted by _Sean A. Irvine_, Jun 08 2024