id:A081841 - OEIS Search Results

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a(1)=0, a(n)=a(n-1)+3 if n is already in th sequence, a(n)=a(n-1)+2 otherwise.

+0
2

0, 2, 4, 7, 9, 11, 14, 16, 19, 21, 24, 26, 28, 31, 33, 36, 38, 40, 43, 45, 48, 50, 52, 55, 57, 60, 62, 65, 67, 69, 72, 74, 77, 79, 81, 84, 86, 89, 91, 94, 96, 98, 101, 103, 106, 108, 110, 113, 115, 118, 120, 123, 125, 127, 130, 132, 135, 137, 139, 142, 144, 147, 149, 151 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`a(1)=0; for n>=1 a(n)=floor(rn-(4r-1)/(r+1)) where r=1+sqrt(2)`
	CROSSREFS	`Adjacent sequences: A081838 A081839 A081840 this_sequence A081842 A081843 A081844` `Sequence in context: A024812 A047349 A054406 this_sequence A027904 A003151 A059542`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 11 2003`

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Last modified October 10 20:39 EDT 2008. Contains 144831 sequences.

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