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 A033034 #7 Jun 19 2012 17:00:04 %S A033034 1,3,5,7,9,11,13,15,25,27,29,31,41,43,45,47,57,59,61,63,73,75,77,79, %T A033034 89,91,93,95,105,107,109,111,121,123,125,127,201,203,205,207,217,219, %U A033034 221,223,233,235,237,239,249,251,253,255,329,331 %N A033034 Numbers all of whose base 8 digits are odd. %H A033034 Harvey P. Dale, <a href="/A033034/b033034.txt">Table of n, a(n) for n = 1..1000</a> %t A033034 Select[Range[500],And@@OddQ[IntegerDigits[#,8]]&] (* _Harvey P. Dale_, Jun 19 2012 *) %K A033034 nonn,base %O A033034 1,2 %A A033034 _Clark Kimberling_