A102488 Numbers in base-12 representation that cannot be written with decimal digits.

10, 11, 22, 23, 34, 35, 46, 47, 58, 59, 70, 71, 82, 83, 94, 95, 106, 107, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 154, 155, 166, 167, 178, 179, 190, 191, 202, 203, 214

Offset

1,1

Links

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

Eric Weisstein's World of Mathematics, Duodecimal

Wikipedia, Duodecimal

Example

143 = 11*12^1 + 11*12^0 = 'BB', therefore 143 is a term.

Mathematica

Select[Range[250], Max[IntegerDigits[#, 12]]>9&] (* Harvey P. Dale, Oct 20 2020 *)

Prog

(Haskell)
import Data.List (unfoldr)
a102488 n = a102488_list !! (n-1)
a102488_list = filter (any (> 9) . unfoldr (\x ->
   if x == 0 then Nothing else Just $ swap $ divMod x 12)) [1..]
-- Reinhard Zumkeller, Apr 18 2011

Crossrefs

Complement of A102487; A102490, A102492, A102494.

Sequence in context: A041200 A041847 A113702 * A022315 A061590 A173900

Adjacent sequences: A102485 A102486 A102487 * A102489 A102490 A102491

Keyword

nonn,base

Author

Reinhard Zumkeller, Jan 12 2005

Status

approved