id:A081843 - OEIS Search Results

Search: id:A081843

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a(1)=0, a(n)=a(n-1)+5 if n is already in th sequence, a(n)=a(n-1)+4 otherwise.

+0
1

0, 4, 8, 13, 17, 21, 25, 30, 34, 38, 42, 46, 51, 55, 59, 63, 68, 72, 76, 80, 85, 89, 93, 97, 102, 106, 110, 114, 118, 123, 127, 131, 135, 140, 144, 148, 152, 157, 161, 165, 169, 174, 178, 182, 186, 191, 195, 199, 203, 207, 212, 216, 220, 224, 229, 233, 237, 241 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`a(n)=floor(rn-(5r-1)/(r+1)) where r=2+sqrt(5)`
	CROSSREFS	`Sequence in context: A032474 A103024 A131041 this_sequence A004938 A004081 A127264` `Adjacent sequences: A081840 A081841 A081842 this_sequence A081844 A081845 A081846`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 11 2003`

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Last modified December 18 21:37 EST 2009. Contains 171024 sequences.

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