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A188643 Numbers which are not a multiple of the product of their digits. 5
10, 13, 14, 16, 17, 18, 19, 20, 21, 22, 23, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Complement of A007602; A188642(a(n)) = 0; A011540 is a subsequence.

LINKS

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

MATHEMATICA

t={}; Do[p=Times@@IntegerDigits[n]; If[p==0, AppendTo[t, n], If[!IntegerQ[n/p], AppendTo[t, n]]], {n, 99}]; t (* Jayanta Basu, May 05 2013 *)

nmpQ[n_]:=Module[{idn=IntegerDigits[n], pr}, pr=If[MemberQ[idn, 0], Pi, Times@@ idn]; Mod[n, pr]!=0]; Select[Range[100], nmpQ] (* Harvey P. Dale, Oct 13 2018 *)

PROG

(Haskell)

import Data.List (elemIndices)

a188643 n = a188643_list !! (n-1)

a188643_list = map succ $ elemIndices 0 $ map a188642 [1..]

CROSSREFS

Cf. A065877.

Sequence in context: A102362 A327270 A070837 * A087140 A226778 A061837

Adjacent sequences:  A188640 A188641 A188642 * A188644 A188645 A188646

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller, Apr 07 2011

STATUS

approved

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Last modified February 17 17:59 EST 2020. Contains 331999 sequences. (Running on oeis4.)