OFFSET
1,3
COMMENTS
List of decimal digits, alphabetically sorted by their names in Czech:
4 _ čtyři, 9 _ devět, 2 _ dva/dvě, 1 _ jeden/jedna/jedno, 0 _ nula, 8 _ osm, 5 _ pět, 7 _ sedm, 6 _ šest, 3 _ tři;
a(144740) = A247800(992) = 4921085763 is the greatest term not containing any repeating digits.
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
PROG
(Haskell)
import Data.IntSet (fromList, deleteFindMin, union)
a247750 n = a247750_list !! (n-1)
a247750_list = 0 : f (fromList [1..9]) where
f s = x : f (s' `union`
fromList (map (+ 10 * x) $ dropWhile (/= mod x 10) digs))
where (x, s') = deleteFindMin s
digs = [4, 9, 2, 1, 0, 8, 5, 7, 6, 3]
CROSSREFS
Cf. A247800 (subsequence).
Cf. A247751 (Danish), A247752 (Dutch), A053432 (English), A247753 (Finnish), A247754 (French), A247755 (German), A247756 (Hungarian), A247757 (Italian), A247758 (Latin), A247759 (Norwegian), A247760 (Polish), A247757 (Portuguese), A247761 (Russian), A247762 (Slovak), A161390 (Spanish), A247759 (Swedish), A247764 (Turkish).
KEYWORD
nonn,base,word
AUTHOR
Reinhard Zumkeller, Oct 05 2014
STATUS
approved