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A247801 Numbers in decimal representation with distinct digits, such that in Danish their digits are in alphabetic order. 17

%I #6 Oct 05 2014 19:03:31

%S 0,1,2,3,4,5,6,7,8,9,10,12,13,14,15,16,17,18,19,23,40,42,43,46,47,48,

%T 49,50,52,53,54,56,57,58,59,62,63,67,72,73,82,83,86,87,90,92,93,96,97,

%U 98,102,103,106,107,108,123,140,142,143,146,147,148,149,150

%N Numbers in decimal representation with distinct digits, such that in Danish their digits are in alphabetic order.

%C List of decimal digits, alphabetically sorted by their names in Danish:

%C 1 _ en/et, 5 _ fem, 4 _ fire, 9 _ ni, 0 _ nul, 8 _ otte, 6 _ seks, 7 _ syv, 2 _ to, 3 _ tre;

%C finite sequence with last and largest term a(992) = 1549086723.

%H Reinhard Zumkeller, <a href="/A247801/b247801.txt">Table of n, a(n) for n = 1..992</a>

%H Wikipedia, <a href="http://de.wikipedia.org/wiki/Zahlen_in_unterschiedlichen_Sprachen#0_bis_10">Zahlen in unterschiedlichen Sprachen</a>

%H Wikipedia, <a href="http://en.wikipedia.org/wiki/List_of_numbers_in_various_languages">List of numbers in various languages</a>

%o (Haskell)

%o import Data.IntSet (fromList, deleteFindMin, union)

%o import qualified Data.IntSet as Set (null)

%o a247801 n = a247801_list !! (n-1)

%o a247801_list = 0 : f (fromList [1..9]) where

%o f s | Set.null s = []

%o | otherwise = x : f (s' `union`

%o fromList (map (+ 10 * x) $ tail $ dropWhile (/= mod x 10) digs))

%o where (x, s') = deleteFindMin s

%o digs = [1, 5, 4, 9, 0, 8, 6, 7, 2, 3]

%Y Intersection of A010784 and Cf. A247751.

%Y Cf. A247800 (Czech), 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), A247813 (Spanish), A247809 (Swedish), A247814 (Turkish).

%K nonn,base,word,fini,full

%O 1,3

%A _Reinhard Zumkeller_, Oct 05 2014

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Last modified April 23 09:48 EDT 2024. Contains 371905 sequences. (Running on oeis4.)