|
|
A128829
|
|
Numbers n such that 6*n^2 + 17 is prime.
|
|
1
|
|
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 20, 21, 23, 25, 26, 27, 28, 30, 31, 33, 36, 37, 38, 41, 42, 44, 46, 48, 49, 50, 53, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 72, 73, 75, 76, 77, 79, 81, 82, 83, 89, 95, 96, 98, 100, 101, 103, 106, 107, 108, 110, 111, 113
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,3
|
|
LINKS
|
|
|
EXAMPLE
|
6*8^2 + 17 = 401 is prime, hence 8 is a term.
|
|
MAPLE
|
a:=proc(n) if isprime(6*n^2+17)=true then n else fi end: seq(a(n), n=0..150); # Emeric Deutsch, Apr 16 2007
|
|
MATHEMATICA
|
Select[Range[0, 200], PrimeQ[6#^2+17]&] (* Harvey P. Dale, Jun 03 2014 *)
|
|
PROG
|
(Magma) [ n: n in [0..113] | IsPrime(6*n^2+17) ]; /* Klaus Brockhaus, Apr 16 2007 */
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,less,easy
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|