id:A073891 - OEIS Search Results

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a(1) = 1, a(2n) = a(2n-1) + c(n) and a(2n+1) = a(2n) - p(n), where c(n)=A002808(n) and p(n)=A000040(n) are the n-th composite and n-th prime numbers, respectively.

+0
2

1, 5, 3, 9, 6, 14, 9, 18, 11, 21, 10, 22, 9, 23, 6, 21, 2, 18, -5, 13, -16, 4, -27, -6, -43, -21, -62, -38, -81, -56, -103, -77, -130, -103, -162, -134, -195, -165, -232, -200, -271, -238, -311, -277, -356, -321, -404, -368, -457, -419, -516, -477, -578, -538, -641, -599, -706, -662, -771, -726, -839, -793 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`All terms from a(23) onward are negative.`
	CROSSREFS	`Cf. A073892.` `Sequence in context: A145800 A161501 A118273 this_sequence A086970 A019955 A075693` `Adjacent sequences: A073888 A073889 A073890 this_sequence A073892 A073893 A073894`
	KEYWORD	`sign`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 17 2002`
	EXTENSIONS	`Edited by Dean Hickerson (dean.hickerson(AT)yahoo.com), Oct 13 2002`

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

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