A128267 - OEIS

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A128267

a(0) = 1; a(n) = GCD((number of earlier terms which are coprime to n),(sum of the earlier terms which are coprime to n)).

1, 1, 2, 1, 3, 1, 4, 1, 2, 1, 1, 1, 8 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	EXAMPLE	`The terms among {a(0),a(1),...a(7)} that are coprime to 8 are a(0)=1, a(1)=1, a(3)=1, a(4)=3, a(5)=1 and a(7)=1. There are 6 such terms and the sum of these terms is 8. So a(8) = GCD(6,8) = 2.`
	CROSSREFS	`Cf. A128268.` `Sequence in context: A102547 A177812 A087267 * A028920 A055396 A057499` `Adjacent sequences: A128264 A128265 A128266 * A128268 A128269 A128270`
	KEYWORD	`more,nonn`
	AUTHOR	`Leroy Quet Feb 22 2007`

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Last modified February 15 05:45 EST 2012. Contains 205694 sequences.