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A085148 Numbers n such that n!!!!!+1 is prime. +0
4
0, 1, 2, 4, 6, 9, 11, 13, 15, 17, 23, 26, 31, 32, 35, 36, 49, 52, 89, 92, 106, 120, 141, 149, 173, 201, 280, 289, 353, 455, 483, 499, 543, 811, 866, 1010, 1126, 1557, 2358, 2411, 2435, 2485, 2491, 2772, 2851, 2937, 2996, 3642, 3777, 4123, 4642, 5566, 6416, 9202, 9382 (list; graph; listen)
OFFSET

1,3

COMMENT

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

Ken Davis, Status of Search for Multifactorial Primes. This site continues the work started by Ray Ballinger.

Ken Davis, Results for n!5+1.

CROSSREFS

Cf. A085157 (quintuple factorials), A085149.

Sequence in context: A065387 A065388 A024978 this_sequence A059566 A059545 A061785

Adjacent sequences: A085145 A085146 A085147 this_sequence A085149 A085150 A085151

KEYWORD

hard,nonn

AUTHOR

Hugo Pfoertner (hugo(AT)pfoertner.org), Jun 23 2003

EXTENSIONS

More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 03 2008

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.


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