|
|
A274986
|
|
Numbers k such that (10^k + 23)/3 is prime.
|
|
1
|
|
|
1, 2, 6, 146, 326, 380, 1116, 1866, 4808, 5528, 5730, 21836, 24804, 38724
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
COMMENTS
|
|
|
LINKS
|
|
|
MATHEMATICA
|
Select[Range[1000], PrimeQ[(10^# + 23) / 3] &]
|
|
PROG
|
(Magma) [n: n in [0..400] | IsPrime((10^n+23) div 3)];
|
|
CROSSREFS
|
Cf. numbers k such that (10^k+m)/3 is prime: A099411 (m=11), this sequence (m=23).
|
|
KEYWORD
|
nonn,less,more
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|