id:A069228 - OEIS Search Results

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a(1)=1, a(2)=4, a(n+2)=(a(n+1)+a(n))/b(n), where b(n)=GCD(a(n+1)+a(n),4).

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1, 4, 5, 9, 7, 4, 11, 15, 13, 7, 5, 3, 2, 5, 7, 3, 5, 2, 7, 9, 4, 13, 17, 15, 8, 23, 31, 27, 29, 14, 43, 57, 25, 41, 33, 37, 35, 18, 53, 71, 31, 51, 41, 23, 16, 39, 55, 47, 51, 49, 25, 37, 31, 17, 12, 29, 41, 35, 19, 27, 23, 25, 12, 37, 49, 43, 23, 33, 14, 47, 61, 27, 22, 49, 71 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`A Collatz-Fibonacci mixture. Conjecture : sequence diverges to infinity.`
	EXAMPLE	`a(4)=9 a(5)=7 so GCD(a(4)+a(5),4)=4 and hence a(6)=16/4=4`
	CROSSREFS	`Adjacent sequences: A069225 A069226 A069227 this_sequence A069229 A069230 A069231` `Sequence in context: A010667 A016722 A030139 this_sequence A021689 A128891 A093667`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 12 2002`

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.

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