A065877 Non-Niven (or non-Harshad) numbers: numbers which are not a multiple of the sum of their digits.

11, 13, 14, 15, 16, 17, 19, 22, 23, 25, 26, 28, 29, 31, 32, 33, 34, 35, 37, 38, 39, 41, 43, 44, 46, 47, 49, 51, 52, 53, 55, 56, 57, 58, 59, 61, 62, 64, 65, 66, 67, 68, 69, 71, 73, 74, 75, 76, 77, 78, 79, 82, 83, 85, 86, 87, 88, 89, 91, 92, 93, 94, 95, 96, 97, 98, 99, 101

Offset

1,1

Comments

A188641(a(n)) = 0; A070635(a(n)) > 0. - Reinhard Zumkeller, Apr 07 2011

Links

Harry J. Smith, Table of n, a(n) for n = 1..1000

Example

13 is in the list because 13 is not a multiple of 1 + 3 = 4.

Mathematica

Select[Range[101], !IntegerQ[#/Total[IntegerDigits[#]]] &] (* Jayanta Basu, May 05 2013 *)

Prog

(PARI) isok(k) = {(k % sumdigits(k)) != 0} \\ Harry J. Smith, Nov 03 2009
(Haskell)
import Data.List (findIndices)
a065877 n = a065877_list !! (n-1)
a065877_list = map succ $ findIndices (> 0) $ map a070635 [1..]
-- Reinhard Zumkeller, Apr 07 2011

Crossrefs

Complement of A005349. Cf. A003635, A007953, A065878.

Cf. A188643.

Sequence in context: A043645 A043700 A111634 * A290468 A129917 A102577

Adjacent sequences: A065874 A065875 A065876 * A065878 A065879 A065880

Keyword

base,nonn

Author

Henry Bottomley, Nov 26 2001

Status

approved