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 A247813 #6 Oct 18 2014 07:40:47 %S A247813 0,1,2,3,4,5,6,7,8,9,21,23,26,27,28,29,31,41,42,43,46,47,48,49,51,52, %T A247813 53,54,56,57,58,59,61,63,67,71,73,81,83,86,87,91,93,96,97,98,231,261, %U A247813 263,267,271,273,281,283,286,287,291,293,296,297,298,421,423 %N A247813 Numbers in decimal representation with distinct digits, such that in Spanish their digits are in alphabetic order. %C A247813 List of decimal digits, alphabetically sorted by their names in Spanish: %C A247813 0 _ cero, 5 _ cinco, 4 _ cuatro, 2 _ dos, 9 _ nueve, 8 _ ocho, 6 _ seis, 7 _ siete, 3 _ tres, 1 _ uno/una; %C A247813 finite sequence with last and largest term a(512) = 542986731. %H A247813 Reinhard Zumkeller, <a href="/A247813/b247813.txt">Table of n, a(n) for n = 1..512</a> %H A247813 Wikipedia, <a href="http://de.wikipedia.org/wiki/Zahlen_in_unterschiedlichen_Sprachen#0_bis_10">Zahlen in unterschiedlichen Sprachen</a> %H A247813 Wikipedia, <a href="http://en.wikipedia.org/wiki/List_of_numbers_in_various_languages">List of numbers in various languages</a> %o A247813 (Haskell) %o A247813 import Data.IntSet (fromList, deleteFindMin, union) %o A247813 import qualified Data.IntSet as Set (null) %o A247813 a247813 n = a247813_list !! (n-1) %o A247813 a247813_list = 0 : f (fromList [1..9]) where %o A247813 f s | Set.null s = [] %o A247813 | otherwise = x : f (s' `union` %o A247813 fromList (map (+ 10 * x) $ tail $ dropWhile (/= mod x 10) digs)) %o A247813 where (x, s') = deleteFindMin s %o A247813 digs = [0, 5, 4, 2, 9, 8, 6, 7, 3, 1] %Y A247813 Intersection of A010784 and A161390 . %Y A247813 Cf. A247800 (Czech), A247801 (Danish), A247802 (Dutch), A053433 (English), A247803 (Finnish), A247804 (French), A247805 (German), A247806 (Hungarian), A247807 (Italian), A247808 (Latin), A247809 (Norwegian), A247810 (Polish), A247807 (Portuguese), A247811 (Russian), A247812 (Slovak), A247809 (Swedish), A247814 (Turkish). %K A247813 nonn,base,word,fini,full %O A247813 1,3 %A A247813 _Reinhard Zumkeller_, Oct 05 2014