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A162683 a(0)=1. a(n) = the number of terms among (a(0),a(1),...a(n-1)) that either are coprime to n or divide n. 1
1, 1, 2, 3, 4, 5, 5, 7, 8, 9, 8, 11, 9, 13, 11, 13, 16, 17, 14, 19, 16, 18, 15, 23, 17, 24, 18, 23, 21, 29, 18, 31, 27, 24, 23, 32, 25, 37, 26, 28, 27, 41, 24, 43, 30, 34, 29, 47, 33, 46, 31, 36, 35, 53, 35, 49, 38, 41, 38, 59, 32, 61, 40, 46, 47, 58, 35, 67, 45, 51, 41, 71, 50 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..72.

CROSSREFS

A162684

Sequence in context: A161656 A306328 A225090 * A073137 A131233 A136623

Adjacent sequences:  A162680 A162681 A162682 * A162684 A162685 A162686

KEYWORD

nonn

AUTHOR

Leroy Quet, Jul 10 2009

EXTENSIONS

More terms from Sean A. Irvine, Nov 03 2009

STATUS

approved

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Last modified August 18 07:30 EDT 2019. Contains 326072 sequences. (Running on oeis4.)