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A130044 a(0)=1. a(n) = number of earlier terms which are coprime to the largest odd divisor of n. 2
1, 1, 2, 3, 4, 5, 5, 7, 8, 8, 8, 11, 11, 13, 13, 12, 16, 17, 16, 19, 18, 17, 20, 23, 21, 22, 24, 22, 26, 29, 22, 31, 32, 23, 32, 30, 30, 37, 37, 29, 35, 41, 33, 43, 38, 33, 44, 47, 39, 46, 44, 39, 47, 53, 43, 40, 53, 44, 56, 59, 44, 61, 61, 49, 64, 53, 46, 67, 66, 53 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Diana Mecum, Table of n, a(n) for n = 0..1000

EXAMPLE

The largest odd divisor of 12 is 3. So a(12) is the number of terms from among (a(0),a(1),a(2),...a(11)) which are coprime to 3, which is 11.

CROSSREFS

Cf. A130043, A000265.

Sequence in context: A073757 A088468 A049448 * A156229 A082081 A008475

Adjacent sequences:  A130041 A130042 A130043 * A130045 A130046 A130047

KEYWORD

nonn

AUTHOR

Leroy Quet, May 02 2007

EXTENSIONS

More terms from Diana L. Mecum, Jun 01 2007

STATUS

approved

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Last modified April 7 12:07 EDT 2020. Contains 333305 sequences. (Running on oeis4.)