login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A102490 Numbers in base-16 representation that cannot be written with decimal digits. 6
10, 11, 12, 13, 14, 15, 26, 27, 28, 29, 30, 31, 42, 43, 44, 45, 46, 47, 58, 59, 60, 61, 62, 63, 74, 75, 76, 77, 78, 79, 90, 91, 92, 93, 94, 95, 106, 107, 108, 109, 110, 111, 122, 123, 124, 125, 126, 127, 138, 139, 140, 141, 142, 143, 154, 155, 156, 157, 158, 159, 160 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

Eric Weisstein's World of Mathematics, Hexadecimal

Wikipedia, Hexadecimal

EXAMPLE

42 = 2*16^1 + 10*16^0 = '2A', therefore 42 is a term.

PROG

(Haskell)

import Data.List (unfoldr)

a102490 n = a102490_list !! (n-1)

a102490_list = filter (any (> 9) . unfoldr

   (\x -> if x == 0 then Nothing else Just $ swap $ divMod x 16)) [0..]

-- Reinhard Zumkeller, Jun 27 2013

CROSSREFS

Complement of A102489; A102488, A102492, A102494.

Sequence in context: A173688 A008709 A008708 * A057947 A228774 A073527

Adjacent sequences:  A102487 A102488 A102489 * A102491 A102492 A102493

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller, Jan 12 2005

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 4 07:43 EDT 2020. Contains 334822 sequences. (Running on oeis4.)