login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A070213 Numbers n such that a(n)=n*a(n-1)+1 with a(1)=0 is prime. 1
4, 8, 18, 20, 70 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The 6th term (if it exists) is larger than 1019.

No additional primes for n < 14000. - T. D. Noe, Jul 07 2005

LINKS

Table of n, a(n) for n=1..5.

Tom Mueller, Prime and Composite Terms in Sloane's Sequence A056542, Journal of Integer Sequences, Vol. 8 (2005), Article 05.3.3.

CROSSREFS

Cf. A056542.

Sequence in context: A174741 A312827 A308150 * A077474 A307817 A210433

Adjacent sequences:  A070210 A070211 A070212 * A070214 A070215 A070216

KEYWORD

hard,nonn

AUTHOR

Tom Mueller (muel4503(AT)uni-trier.de), May 07 2002

EXTENSIONS

a(5) from Tom Mueller (muel4503(AT)uni-trier.de), Oct 30 2004

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 4 09:03 EDT 2020. Contains 336201 sequences. (Running on oeis4.)