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A201964 Primes of the form 10n^2 - 9. 1
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 (list; graph; refs; listen; history; text; internal format)
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: A124994 A126418 A142792 * A226890 A104049 A176922

Adjacent sequences:  A201961 A201962 A201963 * A201965 A201966 A201967

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Dec 07 2011

STATUS

approved

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Last modified September 22 17:16 EDT 2020. Contains 337291 sequences. (Running on oeis4.)