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 A054484 #4 Mar 30 2012 18:51:20 %S A054484 17,19,23,25,26,31,33,34,37,38,39,41,46,47,101,103,115,117,119,121, %T A054484 125,131,133,137,139,143,149,151,152,161,163,167,173,175,178,179,181, %U A054484 182,187,188,191,193,194,199,201,202,217,221,223,227,229,230,231,233,237 %N A054484 Numbers not divisible by any of their digits when written in base 7. %Y A054484 Cf. A038772, A055239, A055240. %K A054484 base,easy,nonn %O A054484 1,1 %A A054484 _Henry Bottomley_, May 12 2000