|
| |
|
|
A110920
|
|
Integers n such that 2*10^n+81 is a prime number.
|
|
0
| |
|
|
2, 3, 6, 7, 8, 15, 36, 38, 51, 168, 1000, 2955, 8151, 16456, 17902, 18784
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable/proven prime - search on "20081".
|
|
|
LINKS
| Makoto Kamada, List of near-repdigit-related prime numbers.
Index entries for primes involving repunits.
|
|
|
EXAMPLE
| n = 3 is a member because 2*10^3+81 = 2*1000+81 = 2000+81 = 2081 and 2081 is prime.
|
|
|
CROSSREFS
| Cf. A049054, A088274, A088275, A095688, A107083, A108049, A108050, A108052, A108054.
Sequence in context: A035346 A030164 A066646 * A145266 A188078 A188094
Adjacent sequences: A110917 A110918 A110919 * A110921 A110922 A110923
|
|
|
KEYWORD
| more,nonn
|
|
|
AUTHOR
| Julien Peter Benney (jpbenney(AT)ftml.net), Oct 04 2005
|
|
|
EXTENSIONS
| a(13)-a(16) from Kamada link by Ray Chandler (rayjchandler(AT)sbcglobal.net), Dec 23 2010
|
| |
|
|
