|
|
A076186
|
|
Numbers n such that n!! + 2^2 is prime.
|
|
12
|
|
|
0, 1, 3, 5, 7, 11, 17, 29, 39, 43, 73, 93, 315, 549, 2059, 5543, 6937, 22819, 34523
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,3
|
|
COMMENTS
|
Since 0!! is defined to be unity (A006882), 0!! + 2^2 = 5, which is prime. - Robert Price, Mar 22 2015
|
|
LINKS
|
|
|
MATHEMATICA
|
Select[Range[0, 1000], PrimeQ[#!! + 4] &] (* Robert Price, Mar 22 2015 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,more
|
|
AUTHOR
|
|
|
EXTENSIONS
|
6937 from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 03 2008
Corrected by Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 03 2008
|
|
STATUS
|
approved
|
|
|
|