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A037083
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Numbers n such that n!!! + 1 is prime (0 is included by convention).
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15
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0, 1, 2, 4, 5, 6, 7, 9, 10, 11, 17, 24, 29, 39, 40, 57, 58, 59, 91, 155, 175, 245, 359, 372, 597, 864, 977, 1077, 1327, 2076, 4798, 4975, 10830, 13453, 15472, 15948, 16116, 16681, 18037, 21725, 22326, 24753, 28565, 32659, 46487, 50649, 51393, 80069, 95493
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| n!!! = n(n-3)(n-6)(n-9)...
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
| Ray Ballinger, Status of Search for Multifactorial Primes
Ken Davis, Status of Search for Multifactorial Primes.
Ken Davis, Results for n!3+1.
Index entries for sequences related to factorial numbers
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CROSSREFS
| Cf. A007661 (triple factorials), A084438, A037082.
Sequence in context: A039101 A140102 A084437 * A188033 A187485 A039052
Adjacent sequences: A037080 A037081 A037082 * A037084 A037085 A037086
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KEYWORD
| nonn
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AUTHOR
| G. L. Honaker, Jr. (honak3r(AT)gmail.com)
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EXTENSIONS
| More terms from Steven L. Harvey (sharvey(AT)co.coconino.az.us)
Corrected and extended by Hugo Pfoertner (hugo(AT)pfoertner.org), Jun 25 2003
More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 03 2008
Edited by N. J. A. Sloane (njas(AT)research.att.com), Jan 14 2008
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