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 A023748 #13 Apr 02 2014 06:13:19 %S A023748 0,1,2,3,4,5,7,8,9,10,11,14,15,16,17,21,22,23,28,29,35,43,44,45,46,47, %T A023748 50,51,52,53,57,58,59,64,65,71,86,87,88,89,93,94,95,100,101,107,129, %U A023748 130,131,136,137,143,172,173,179,215,259,260,261,262,263,266,267 %N A023748 Plaindromes: numbers whose digits in base 6 are in nondecreasing order. %H A023748 Vincenzo Librandi, <a href="/A023748/b023748.txt">Table of n, a(n) for n = 1..2800</a> %t A023748 Select[Range[0,267],LessEqual@@IntegerDigits[#,6]&] (* _Ray Chandler_, Jan 06 2014 *) %K A023748 nonn,base,easy %O A023748 1,3 %A A023748 _Olivier Gérard_ %E A023748 Change offset to 1 by _Ray Chandler_, Jan 06 2014