OFFSET
1,6
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
FORMULA
Table[Length[Union[IntegerDigits[Prime[w]]]], {w, 1, 1000}]
EXAMPLE
The maximum is 10. Thus 1234567891 is a prime with 9 and 123456789011 with 10 different decimal digits.
PROG
(Haskell)
import Data.List (nub, sort)
a060417 = length . nub . show . a000040
-- Reinhard Zumkeller, Apr 08 2012
CROSSREFS
KEYWORD
base,easy,nonn
AUTHOR
Labos Elemer, Apr 05 2001
STATUS
approved