

A109358


Square root of squares of form 2*p + 3, where p is prime.


6



3, 5, 7, 11, 13, 19, 23, 25, 29, 31, 37, 41, 47, 55, 65, 67, 73, 77, 79, 91, 97, 101, 103, 109, 119, 143, 151, 155, 157, 161, 187, 197, 205, 209, 211, 221, 227, 233, 235, 239, 245, 253, 257, 263, 265, 275, 287, 289, 293, 299, 305, 307, 323, 331, 337, 349, 353
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OFFSET

1,1


COMMENTS

Numbers n such that (n^23)/2 is prime.  Robert Israel, Jan 22 2018


LINKS

Robert Israel, Table of n, a(n) for n = 1..10000


FORMULA

a(n) = SQRT(A109367(n)).


MAPLE

select(t > isprime((t^23)/2), [seq(n, n=1..1000, 2)]); # Robert Israel, Jan 22 2018


MATHEMATICA

Select[Table[(2Prime[n] + 3)^(1/2), {n, 7000}], IntegerQ] (* Ray Chandler, Aug 25 2005 *)


CROSSREFS

Cf. A098828, A109367.
Sequence in context: A264754 A130289 A071329 * A216285 A192862 A110589
Adjacent sequences: A109355 A109356 A109357 * A109359 A109360 A109361


KEYWORD

nonn


AUTHOR

Giovanni Teofilatto, Aug 22 2005


EXTENSIONS

Extended by Ray Chandler, Aug 25 2005


STATUS

approved



