id:A115043 - OEIS Search Results

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Alternately multiply and divide, with a(0)=3 and a(1)=5.

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3, 5, 15, 3, 45, 15, 675, 45, 30375, 675, 20503125, 30375, 622782421875, 20503125, 12768985843505859375, 622782421875, 7952299928506168842315673828125, 12768985843505859375 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`All divisors >1 of the terms are also in the sequence.`
	FORMULA	`a(0) = 3^1, a(1)= 5^1 a(n) = 3^a(n-1)+a(n-2)5^a(n-1)+a(n-2) and a(n+1) = a(n)/ a(n-2) a(n) = 3^F(n)5^F(n), where F() = Fibonacci numbers A000045.`
	CROSSREFS	`Cf. A115033, A115034.` `Sequence in context: A081393 A129326 A118562 this_sequence A058220 A100181 A111869` `Adjacent sequences: A115040 A115041 A115042 this_sequence A115044 A115045 A115046`
	KEYWORD	`easy,nonn`
	AUTHOR	`Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Feb 28 2006`

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.

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