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A085148
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Numbers n such that n!!!!!+1 is prime.
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14
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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;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,3
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COMMENTS
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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).
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LINKS
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CROSSREFS
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KEYWORD
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hard,nonn
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AUTHOR
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EXTENSIONS
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More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 03 2008
a(56)-a(64), with a(62)-(64) from the Ken Davis link, added to b-file by Robert Price, Sep 23 2012
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STATUS
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approved
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