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A088873 Number of different values of A000005(d) where d is a divisor of n. 5
1, 2, 2, 3, 2, 3, 2, 4, 3, 3, 2, 5, 2, 3, 3, 5, 2, 5, 2, 5, 3, 3, 2, 6, 3, 3, 4, 5, 2, 4, 2, 6, 3, 3, 3, 6, 2, 3, 3, 6, 2, 4, 2, 5, 5, 3, 2, 8, 3, 5, 3, 5, 2, 6, 3, 6, 3, 3, 2, 7, 2, 3, 5, 7, 3, 4, 2, 5, 3, 4, 2, 8, 2, 3, 5, 5, 3, 4, 2, 8, 5, 3, 2, 7, 3, 3, 3, 6, 2, 7, 3, 5, 3, 3, 3, 9, 2, 5, 5, 6, 2, 4, 2, 6 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..10000

PROG

(PARI) a(n) = {vals = Set(); fordiv(n, d, vals = Set(concat(vals, numdiv(d)))); return (length(vals)); } \\ Michel Marcus, Jul 14 2013

CROSSREFS

Cf. A000005.

Differs from A085082 and A181796 for the first time at n=24, where a(24) = 6, while A085082(24) = A181796(24) = 7.

Sequence in context: A175193 A073093 A222084 * A085082 A181796 A067554

Adjacent sequences:  A088870 A088871 A088872 * A088874 A088875 A088876

KEYWORD

easy,nonn

AUTHOR

Naohiro Nomoto, Nov 30 2003

STATUS

approved

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Last modified February 25 10:54 EST 2018. Contains 299653 sequences. (Running on oeis4.)