

A095049


Number of distinct digits needed to write in decimal representation all positive nondivisors of n that are less than n.


1



0, 0, 1, 1, 3, 2, 5, 4, 6, 6, 10, 6, 10, 9, 9, 9, 10, 9, 10, 9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10
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OFFSET

1,5


COMMENTS

a(n) = 10 for n > 20.


LINKS

Table of n, a(n) for n=1..74.


EXAMPLE

Set of nondivisors of n=12: {5,7,8,9,10,11}, therefore
a(12)=#{0,1,5,7,8,9}=6.


MATHEMATICA

Table[Length[Union[Flatten[IntegerDigits/@Complement[Range[n], Divisors[ n]]]]], {n, 80}] (* Harvey P. Dale, Jan 06 2019 *)


CROSSREFS

Cf. A095048, A043537.
Sequence in context: A089279 A049820 A109712 * A118209 A109451 A160017
Adjacent sequences: A095046 A095047 A095048 * A095050 A095051 A095052


KEYWORD

nonn,base


AUTHOR

Reinhard Zumkeller, May 28 2004


STATUS

approved



