id:A136350 - OEIS Search Results

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Primorial numbers #p such that (#p)-1 is composite.

+0
4

210, 510510, 9699690, 223092870, 6469693230, 200560490130, 7420738134810, 13082761331670030, 614889782588491410, 32589158477190044730, 1922760350154212639070, 117288381359406970983270 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`This sequence is different from A121069 and A002110.`
	FORMULA	`{A002110(j): A002110(j)-1 in A002808}. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 23 2008`
	EXAMPLE	`a(1)=210 because 209=A002110(4)-1 is not prime.`
	CROSSREFS	`Cf. A136349, A136351, A136352, A002110, A121069.` `Sequence in context: A089514 A014979 A134236 this_sequence A068297 A028677 A114442` `Adjacent sequences: A136347 A136348 A136349 this_sequence A136351 A136352 A136353`
	KEYWORD	`easy,nonn`
	AUTHOR	`Enoch Haga (Enokh(AT)comcast.net), Dec 25 2007`
	EXTENSIONS	`Edited and extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 23 2008`

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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

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