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A110480
Numbers n such that (n^2+6)/5 is prime.
3
2, 3, 7, 17, 23, 47, 53, 77, 133, 143, 157, 173, 193, 203, 217, 233, 247, 343, 347, 353, 373, 383, 427, 443, 457, 493, 527, 577, 583, 707, 767, 817, 823, 847, 857, 893, 907, 973, 1003, 1067, 1117, 1127, 1153, 1193, 1207, 1223, 1243, 1253, 1277, 1333, 1397
OFFSET
1,1
LINKS
FORMULA
a(n) = Sqrt(A110481(n)).
MATHEMATICA
Select[Range[1500], PrimeQ[(#^2+6)/5]&] (* Harvey P. Dale, May 24 2013 *)
PROG
(PARI) is(n)=isprime((n^2+6)/5) \\ Charles R Greathouse IV, May 22 2017
CROSSREFS
Sequence in context: A113425 A289379 A245590 * A338175 A268539 A083822
KEYWORD
nonn
AUTHOR
Giovanni Teofilatto, Sep 09 2005
EXTENSIONS
Corrected and extended by Rick L. Shepherd and Ray Chandler, Sep 12 2005
STATUS
approved