id:A121173 - OEIS Search Results

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Sequence S with property that for n is S, a(n)=a(1)+a(2)+...+a(n-1), and for n not in S, a(n)=n+1.

+0
3

2, 2, 4, 8, 6, 22, 8, 52, 10, 114, 12, 240, 14, 494, 16, 1004, 18, 2026, 20, 4072, 22, 8166, 24, 16356, 26, 32738, 28, 65504, 30, 131038, 32, 262108, 34, 524250, 36, 1048536, 38, 2097110, 40, 4194260, 42, 8388562, 44, 16777168, 46, 33554382 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`a(1)=1 cannot happen, so the sequence S starts with a(1)=2.` `Note that a(n)=a(1)+a(2)+...+a(n-1) can hold even if n is not in S. The smallest example is n=3.`
	CROSSREFS	`Cf. A105753, A121053, A121174, A121175.` `Adjacent sequences: A121170 A121171 A121172 this_sequence A121174 A121175 A121176` `Sequence in context: A077968 A123958 A048572 this_sequence A101651 A132007 A094605`
	KEYWORD	`nonn`
	AUTHOR	`Max Alekseyev, Aug 15 2006`

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Last modified October 13 17:46 EDT 2008. Contains 145008 sequences.

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