id:A126091 - OEIS Search Results

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a(1)=1;a(2)=4; for n>2, a(n)=a(n-2)+3 if n is already in the sequence, a(n)=a(n-2)+1 otherwise.

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1, 4, 2, 7, 3, 8, 6, 11, 7, 12, 10, 15, 11, 16, 14, 19, 15, 20, 18, 23, 19, 24, 22, 27, 23, 28, 26, 31, 27, 32, 30, 35, 31, 36, 34, 39, 35, 40, 38, 43, 39, 44, 42, 47, 43, 48, 46, 51, 47, 52, 50, 55, 51, 56, 54, 59, 55, 60, 58, 63, 59, 64, 62, 67, 63, 68, 66, 71, 67, 72, 70, 75 (list; graph; listen)

	OFFSET	`1,2`
	MATHEMATICA	`a={1, 4}; Do[If[MemberQ[a, n], b=a[[n-2]]+3, b=a[[n-2]]+1]; AppendTo[a, b], {n, 3, 70}]; a`
	CROSSREFS	`Cf. A080578, A080455-A080458.` `Sequence in context: A010648 A021238 A105727 this_sequence A026189 A026213 A123684` `Adjacent sequences: A126088 A126089 A126090 this_sequence A126092 A126093 A126094`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)gmail.com), Mar 11 2007`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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