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A072586 Number of numbers <= n having prime factors with odd exponents only. 1
0, 1, 2, 2, 3, 4, 5, 6, 6, 7, 8, 8, 9, 10, 11, 11, 12, 12, 13, 13, 14, 15, 16, 17, 17, 18, 19, 19, 20, 21, 22, 23, 24, 25, 26, 26, 27, 28, 29, 30, 31, 32, 33, 33, 33, 34, 35, 35, 35, 35, 36, 36, 37, 38, 39, 40, 41, 42, 43, 43, 44, 45, 45, 45, 46, 47, 48, 48, 49, 50, 51, 51, 52 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..73.

CROSSREFS

Cf. A002035, A000196.

Sequence in context: A331306 A119353 A140859 * A329548 A028391 A038668

Adjacent sequences:  A072583 A072584 A072585 * A072587 A072588 A072589

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Jun 23 2002

STATUS

approved

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Last modified March 3 10:38 EST 2021. Contains 341762 sequences. (Running on oeis4.)