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

 

Logo

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A301918 Primes which divide numbers of the form 3^k+3. 1
2, 3, 5, 7, 17, 19, 29, 31, 37, 41, 43, 53, 61, 67, 73, 79, 89, 97, 101, 103, 113, 127, 137, 139, 149, 151, 157, 163, 173, 193, 197, 199, 211, 223, 233, 241, 257, 269, 271, 281, 283, 293, 307, 317, 331, 337, 349, 353, 367, 373, 379, 389, 397, 401, 409, 439 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

3 is the only number in this sequence which is not in A301916.

Can be used to factor P+1 values where P is a potential prime of the form 3^k+2.

Is this 2 and 3 with A045318? - David A. Corneth, May 04 2018

LINKS

Table of n, a(n) for n=1..56.

EXAMPLE

All values of 3^k+3 are multiples of 2, so 2 is in the sequence.

3^4+3=84, which is a multiple of 7, so 7 is in the sequence.

CROSSREFS

Cf. A045318, A301916, A301917, A301919.

Sequence in context: A164060 A113029 A090432 * A127042 A069802 A067954

Adjacent sequences:  A301915 A301916 A301917 * A301919 A301920 A301921

KEYWORD

nonn

AUTHOR

Luke W. Richards, Mar 28 2018

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 January 22 16:37 EST 2020. Contains 331152 sequences. (Running on oeis4.)