A241158 Numbers in which the two leading (most significant) digits are distinct.

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 120

Offset: 1

Author

N. J. A. Sloane, Apr 18 2014

Keywords

• nonn
• base

Comments

More than the usual number of terms are displayed in order to show the difference from some closely-related sequences.

Links

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

Crossrefs

Cf. A010784, A043096, A241157.

Programs

Haskell

a241158 n = a241158_list !! (n-1)
a241158_list = filter (f . show)  [0..] where
   f [] = True; f (d : d' : ) = d /= d'
-- Reinhard Zumkeller, May 02 2014