A051592 - OEIS

This site is supported by donations to The OEIS Foundation.

A051592

Numbers n such that n!!!!!!-1 is prime.

3, 4, 6, 12, 14, 54, 74, 102, 114, 302, 318, 366, 614, 1178, 1188, 3110, 7284, 21432, 21906, 25848, 29882, 38618, 41990, 84510, 86022 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`n!!!!!! = n(n-6)(n-12)(n-18)...` `The search for multifactorial primes started by Ray Ballinger is now continued by a team of volunteers on the website of Ken Davis (see link).`
	LINKS	`Ray Ballinger, Status of Search for Multifactorial Primes` `Ken Davis, Status of Search for Multifactorial Primes` `Ken Davis, Results for n!6-1.`
	CROSSREFS	`Cf. A085158 (sextuple factorials), A085150.` `Sequence in context: A113728 A000114 A136243 * A044843 A024373 A015888` `Adjacent sequences: A051589 A051590 A051591 * A051593 A051594 A051595`
	KEYWORD	`hard,nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`
	EXTENSIONS	`Edited and extended by Hugo Pfoertner (hugo(AT)pfoertner.org), Jun 23 2003` `Corrected and extended by Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 03 2008`

Content is available under The OEIS End-User License Agreement .

Last modified February 14 23:53 EST 2012. Contains 205689 sequences.