id:A053079 - OEIS Search Results

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a(1)=1; a(m+1)= sum{k=1 to m} [GCD(k, a(m+1-k))].

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1, 1, 2, 3, 5, 5, 9, 7, 9, 17, 15, 13, 17, 15, 27, 33, 21, 27, 29, 29, 35, 33, 29, 45, 55, 51, 73, 41, 59, 61, 57, 39, 63, 57, 59, 85, 49, 87, 65, 65, 77, 93, 83, 107, 117, 73, 91, 95, 137, 97, 117, 125, 115, 131 (list; graph; listen)

	OFFSET	`1,3`
	LINKS	`Leroy Quet, Home Page (listed in lieu of email address)`
	EXAMPLE	`a(7)= GCD(1,a(6)) +GCD(2,a(5)) +GCD(3,a(4)) +GCD(4,a(3)) +GCD(5,a(2)) +GCD(6,a(1))= 1 + 1 +3 +2 + 1 + 1= 9`
	CROSSREFS	`Sequence in context: A006447 A014237 A033885 this_sequence A158901 A096736 A128188` `Adjacent sequences: A053076 A053077 A053078 this_sequence A053080 A053081 A053082`
	KEYWORD	`nonn`
	AUTHOR	`Leroy Quet Feb 25 2000`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

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