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A247757
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Numbers in decimal representation, such that in Italian and Portuguese their digits are in alphabetic order.
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17
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 20, 21, 22, 23, 24, 26, 27, 28, 29, 30, 31, 33, 40, 41, 43, 44, 46, 47, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 63, 66, 67, 70, 71, 73, 77, 80, 81, 83, 84, 86, 87, 88, 90, 91, 93, 94, 96, 97, 98, 99, 100, 110
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,3
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COMMENTS
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List of decimal digits, alphabetically sorted by their names in Italian resp. Portuguese: 5 _ cinque _ cinco, 2 _ due _ dois/duas, 9 _ nove _ nove, 8 _ otto _ oito, 4 _ quattro _ quatro, 6 _ sei _ seis, 7 _ sette _ sete, 3 _ tre _ tres, 1 _ uno _ um, 0 _ zero _ zero;
a(129217) = A247807(1023) = 5298467310 is the greatest term not containing any repeating digits.
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LINKS
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PROG
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(Haskell)
import Data.IntSet (fromList, deleteFindMin, union)
a247757 n = a247757_list !! (n-1)
a247757_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 = [5, 2, 9, 8, 4, 6, 7, 3, 1, 0]
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CROSSREFS
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Cf. A247750 (Czech), A247751 (Danish), A247752 (Dutch), A053432 (English), A247753 (Finnish), A247754 (French), A247755 (German), A247756 (Hungarian), A247758 (Latin), A247759 (Norwegian), A247760 (Polish), A247761 (Russian), A247762 (Slovak), A161390 (Spanish), A247759 (Swedish), A247764 (Turkish).
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KEYWORD
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nonn,base,word
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AUTHOR
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STATUS
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approved
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