

A180410


Unique digits used in n in numerical order


4



1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 1, 12, 13, 14, 15, 16, 17, 18, 19, 2, 12, 2, 23, 24, 25, 26, 27, 28, 29, 3, 13, 23, 3, 34, 35, 36, 37, 38, 39, 4, 14, 24, 34, 4, 45, 46, 47, 48, 49, 5, 15, 25, 35, 45, 5, 56, 57, 58, 59, 6, 16, 26, 36, 46, 56, 6, 67, 68, 69, 7
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,2


COMMENTS

a(n) = A227362(n)  A151949(n).  Reinhard Zumkeller, Jul 09 2013


LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000


FORMULA

a(n) = 0123456789 after any digits not appearing in n are removed


EXAMPLE

a(93077) = 0379 = 379. Seven is only used once and the digits are sorted. The initial zero is not shown.


PROG

(Haskell)
import Data.List (nub, sort)
a180410 = read . sort . nub . show :: Integer > Integer
 Reinhard Zumkeller, Jul 09 2013


CROSSREFS

This is identical to A180409 with the zeros removed
Sequence in context: A326652 A222493 A032762 * A071650 A037265 A292685
Adjacent sequences: A180407 A180408 A180409 * A180411 A180412 A180413


KEYWORD

easy,nonn,base,look


AUTHOR

Dominick Cancilla, Sep 02 2010


STATUS

approved



