id:A083658 - OEIS Search Results

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a(n) = a(n-1) + a(n-2) + gcd(a(n-1),a(n-2)) for n>1, with a(0)=1, a(1)=1.

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1, 1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 729, 1215, 2187, 3645, 6561, 10935, 19683, 32805, 59049, 98415, 177147, 295245, 531441, 885735, 1594323, 2657205, 4782969, 7971615, 14348907, 23914845, 43046721, 71744535, 129140163, 215233605 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`a(2n)=3^n, a(2n+1)=5*3^(n-1) for n>0, with a(0)=1, a(1)=1.`
	CROSSREFS	`Sequence in context: A029485 A147087 A140190 this_sequence A018436 A018298 A017913` `Adjacent sequences: A083655 A083656 A083657 this_sequence A083659 A083660 A083661`
	KEYWORD	`nonn`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Jun 13 2003`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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