login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A139819 Complement of repdigit numbers A010785. 7
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Identical to (base 10) non-palindromic numbers A029742 up to a(83) = 101 which is a term of this sequence but not in A029742. - M. F. Hasler, Sep 08 2015

LINKS

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

E. W. Weisstein, Repdigit, World of Mathematics, wolfram.com.

Wikipedia, Repdigit

FORMULA

A202022(a(n)) = 0. - Reinhard Zumkeller, Dec 09 2011

MAPLE

isA139819 := proc(n)

    convert(n, base, 10) ;

    convert(%, set) ;

    simplify(nops(%) >1 ) ;

end proc: # R. J. Mathar, Jan 17 2017

PROG

(Haskell) a139819 n = a139819_list !! (n-1)

a139819_list = filter ((== 0) . a202022) [0..] -- Reinhard Zumkeller, Dec 09 2011

(PARI) is_A139819(n)=#Set(digits(n))>1 \\ M. F. Hasler, Sep 08 2015

CROSSREFS

Cf. A066484 (subsequence).

Cf. A029742 (non-palindromic in base 10), A016038 (in any base), A050813 (in bases 2..10).

Sequence in context: A109394 A285687 A139704 * A288040 A031955 A029742

Adjacent sequences:  A139816 A139817 A139818 * A139820 A139821 A139822

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane, Jun 02 2008

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 February 20 23:24 EST 2019. Contains 320362 sequences. (Running on oeis4.)