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 A054475 #3 Mar 30 2012 18:51:20 %S A054475 11,35,43,47,59,131,139,143,163,175,179,187,191,203,227,235,239,251, %T A054475 515,523,527,547,559,563,571,575,643,655,683,691,703,707,715,719,739, %U A054475 751,755,763,767,779,803,811,815,827,899,907,911,931,943,947,955,959 %N A054475 Numbers not divisible by any of their digits when written in base 4. %Y A054475 Cf. A038772, A055239, A055240. %K A054475 base,easy,nonn %O A054475 1,1 %A A054475 _Henry Bottomley_, May 12 2000