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 A023750 #17 Oct 18 2018 21:47:20 %S A023750 0,1,2,3,4,5,6,7,9,10,11,12,13,14,15,18,19,20,21,22,23,27,28,29,30,31, %T A023750 36,37,38,39,45,46,47,54,55,63,73,74,75,76,77,78,79,82,83,84,85,86,87, %U A023750 91,92,93,94,95,100,101,102,103,109,110,111,118,119,127,146,147 %N A023750 Plaindromes: numbers whose digits in base 8 are in nondecreasing order. %H A023750 Vincenzo Librandi, <a href="/A023750/b023750.txt">Table of n, a(n) for n = 1..9000</a> %p A023750 filter:= proc(n) local L; %p A023750 L:= convert(n,base,8); %p A023750 L = sort(L,`>`) %p A023750 end proc: %p A023750 select(filter, [$0..1000]); # _Robert Israel_, Nov 29 2017 %t A023750 Select[Range[0,147],LessEqual@@IntegerDigits[#,8]&] (* _Ray Chandler_, Jan 06 2014 *) %K A023750 nonn,base,easy,look %O A023750 1,3 %A A023750 _Olivier Gérard_ %E A023750 Offset changed to 1 by _Ray Chandler_, Jan 06 2014