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A201706 Primes of the form 9n^2 + 4. 1
13, 229, 733, 1093, 2029, 3253, 7573, 13693, 18229, 21613, 31333, 33493, 42853, 59053, 65029, 71293, 91813, 127453, 140629, 178933, 189229, 199813, 205213, 227533, 233293, 245029, 257053, 328333, 378229, 439573, 514093, 567013 (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[9n^2+4, {n, 0, 1000}], PrimeQ]

PROG

(MAGMA) [a: n in [0..300] | IsPrime(a) where a is 9*n^2+4];

CROSSREFS

Sequence in context: A218588 A158518 A223548 * A176722 A083081 A083306

Adjacent sequences:  A201703 A201704 A201705 * A201707 A201708 A201709

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Dec 04 2011

STATUS

approved

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Last modified June 19 03:31 EDT 2021. Contains 345125 sequences. (Running on oeis4.)