login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A037083 Numbers n such that n!!! + 1 is prime (0 is included by convention). 18
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; text; internal format)
OFFSET
1,3
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).
LINKS
CROSSREFS
Cf. A007661 (triple factorials), A084438, A037082.
Sequence in context: A140102 A288866 A084437 * A188033 A187485 A039052
KEYWORD
nonn
AUTHOR
EXTENSIONS
More terms from Steven Harvey
Corrected and extended by Hugo Pfoertner, Jun 25 2003
More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 03 2008
Edited by N. J. A. Sloane, Jan 14 2008
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 21 04:08 EST 2024. Contains 370219 sequences. (Running on oeis4.)