id:A162154 - OEIS Search Results

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Odd terms are the amount of consecutive prime numbers until a composite, even terms are the amount of consecutive composite numbers until a prime.

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2, 1, 1, 1, 1, 3, 1, 1, 1, 3, 1, 1, 1, 3, 1, 5, 1, 1, 1, 5, 1, 3, 1, 1, 1, 3, 1, 5, 1, 5, 1, 1, 1, 5, 1, 3, 1, 1, 1, 5, 1, 3, 1, 5, 1, 7, 1, 3, 1, 1, 1, 3, 1, 1, 1, 3, 1, 13, 1, 3, 1, 5, 1, 1, 1, 9, 1, 1, 1, 5, 1, 5, 1, 3, 1, 5, 1, 5, 1, 1, 1, 9, 1, 1, 1, 3, 1, 1, 1, 11, 1, 11, 1, 3, 1, 1, 1, 3, 1, 5, 1, 1, 1, 9 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`a(1)=2 because there are two consecutive primes(2 and 3), a(2)=1 (4), a(6)=3 (8,9,10)`
	FORMULA	`a(2n)=A046933(n+1). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 27 2009]`
	CROSSREFS	`Sequence in context: A137773 A107454 A063669 this_sequence A134505 A076933 A071974` `Adjacent sequences: A162151 A162152 A162153 this_sequence A162155 A162156 A162157`
	KEYWORD	`nonn`
	AUTHOR	`Claudio L Meller (claudiomeller(AT)gmail.com), Jun 26 2009`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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