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Search: id:A049421
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A049421 Numbers n such that (n!/n#)-1 is prime, where n# = primorial numbers A034386. +0
1
4, 6, 8, 16, 21, 34, 39, 45, 50, 72, 76, 133, 164, 202, 216, 221, 280, 496, 605, 2532, 2967, 3337 (list; graph; listen)
OFFSET

1,1

COMMENT

n!/n# is known as n compositorial.

LINKS

Chris Caldwell, Compositorial

CROSSREFS

Cf. A049420.

Sequence in context: A095299 A079250 A055397 this_sequence A039624 A083166 A022599

Adjacent sequences: A049418 A049419 A049420 this_sequence A049422 A049423 A049424

KEYWORD

hard,nonn

AUTHOR

Paul Jobling (paul.jobling(AT)whitecross.com)

EXTENSIONS

More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Jun 21 2001

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.


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