

A309726


Numbers n such that n^2  12 is prime.


1



5, 7, 11, 13, 17, 19, 25, 29, 35, 41, 49, 53, 59, 61, 79, 85, 91, 95, 97, 103, 107, 113, 119, 121, 137, 139, 145, 149, 163, 169, 173, 179, 181, 185, 191, 205, 209, 227, 233, 235, 245, 251
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OFFSET

1,1


COMMENTS

All terms are odd and not divisible by 3.


LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000


FORMULA

If A056927(n) = 12, then n is a term.  A.H.M. Smeets, Aug 15 2019


EXAMPLE

11 is in the sequence because 11^2  12 = 109, which is prime.


MATHEMATICA

Select[Range[5, 301, 2], PrimeQ[#^212]&] (* Harvey P. Dale, Dec 23 2019 *)


PROG

(PARI) select(n>isprime(n^212), [1..1000]) \\ Andrew Howroyd, Aug 14 2019


CROSSREFS

Cf. A028870, A028873, A028876, A028879, A028882, A028885, A186815, A090696, A296507.
Cf. A056927.
Sequence in context: A216524 A128824 A098420 * A093495 A093496 A171688
Adjacent sequences: A309723 A309724 A309725 * A309727 A309728 A309729


KEYWORD

nonn


AUTHOR

Daniel Starodubtsev, Aug 14 2019


STATUS

approved



