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A108180 Numbers n such that n^n * (n!/n#) + 1 is prime, where n# = primorial numbers (A034386). 0
1, 2, 8, 20, 23, 55, 57, 58, 181, 741, 939 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
n!/n# is known as n compositorial. All values have been proved prime. No more terms up to 3200.
LINKS
CROSSREFS
Sequence in context: A030097 A136904 A043002 * A233571 A192153 A190640
KEYWORD
more,nonn
AUTHOR
Jason Earls, Jul 24 2005
STATUS
approved

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Last modified February 22 09:09 EST 2024. Contains 370250 sequences. (Running on oeis4.)