A201964 Primes of the form 10n^2 - 9.

31, 151, 241, 631, 991, 1201, 1951, 2551, 4831, 5281, 9601, 11551, 12241, 13681, 14431, 15991, 18481, 24001, 27031, 28081, 30241, 37201, 38431, 48991, 53281, 54751, 57751, 59281, 62401, 67231, 68881, 73951, 77431, 79201, 84631

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..5000

Mathematica

Select[Table[10n^2-9, {n, 1, 600}], PrimeQ]

Prog

(Magma) [a: n in [1..200] | IsPrime(a) where a is 10*n^2-9];

Crossrefs

Sequence in context: A126418 A347109 A142792 * A226890 A104049 A176922

Adjacent sequences: A201961 A201962 A201963 * A201965 A201966 A201967

Keyword

nonn,easy

Author

Vincenzo Librandi, Dec 07 2011

Status

approved