A203814 - OEIS

A203814

Number of numbers <= n having as many distinct digits as n has.

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 11, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 13, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 14, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 15, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 16, 52, 53

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,2

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 0..10000

EXAMPLE

a(9) = #{0, 1, 2, 3, 4, 5, 6, 7, 8, 9} = 10;

a(10) = #{10} = 1;

a(11) = #{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11} = 11;

a(12) = #{10, 12} = 2.

PROG

(Haskell)