A250180 Numbers n such that Phi_25(n) is prime, where Phi is the cyclotomic polynomial.

1, 22, 33, 39, 43, 62, 74, 134, 142, 167, 212, 238, 287, 313, 335, 369, 414, 415, 418, 432, 509, 604, 679, 697, 770, 782, 815, 859, 874, 895, 897, 924, 1039, 1048, 1070, 1085, 1134, 1145, 1170, 1177, 1212, 1239, 1240, 1262, 1339, 1347, 1364, 1374, 1407, 1413, 1414, 1449

Offset

1,2

Links

G. C. Greubel, Table of n, a(n) for n = 1..10000

Mathematica

a250180[n_] := Select[Range[n], PrimeQ@Cyclotomic[25, #] &]; a250180[256]

Prog

(PARI) isok(n) = isprime(polcyclo(25, n)); \\ Michel Marcus, Dec 27 2014

Crossrefs

See A250177 for references.

Sequence in context: A216798 A100372 A084996 * A252078 A342445 A337163

Adjacent sequences: A250177 A250178 A250179 * A250181 A250182 A250183

Keyword

nonn

Author

Eric Chen, Dec 26 2014

Status

approved