id:A102885 - OEIS Search Results

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Index of n in the primes A000040 or nonprimes A141468.

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1, 2, 1, 2, 3, 3, 4, 4, 5, 6, 7, 5, 8, 6, 9, 10, 11, 7, 12, 8, 13, 14, 15, 9, 16, 17, 18, 19, 20, 10, 21, 11, 22, 23, 24, 25, 26, 12, 27, 28, 29, 13, 30, 14, 31, 32, 33, 15, 34, 35, 36, 37, 38, 16, 39, 40, 41, 42, 43, 17, 44, 18, 45, 46, 47, 48, 49, 19, 50, 51, 52, 20, 53, 21, 54 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`The nonnegative numbers n occur exactly once in either A000040 or A141468. The sequence lists the corresponding index. It is a permutation of A008619.`
	FORMULA	`A141468(a(n))=n or A000040(a(n))=n.`
	CROSSREFS	`Cf. A141468, A000040, A026233.` `Sequence in context: A129636 A048219 A087188 this_sequence A138585 A070048 A116498` `Adjacent sequences: A102882 A102883 A102884 this_sequence A102886 A102887 A102888`
	KEYWORD	`nonn,easy`
	AUTHOR	`Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Aug 17 2008`
	EXTENSIONS	`Edited by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 19 2008`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

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