

A057760


Numbers n such that 2 is a cube mod n.


4



1, 2, 3, 5, 6, 10, 11, 15, 17, 22, 23, 25, 29, 30, 31, 33, 34, 41, 43, 46, 47, 50, 51, 53, 55, 58, 59, 62, 66, 69, 71, 75, 82, 83, 85, 86, 87, 89, 93, 94, 101, 102, 106, 107, 109, 110, 113, 115, 118, 121, 123, 125, 127, 129, 131, 137, 138, 141, 142
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OFFSET

1,2


COMMENTS

Numbers not divisible by 4 or 9 and whose prime divisors are in A040028.  Eric M. Schmidt, Jan 25 2014


LINKS

T. D. Noe, Table of n, a(n) for n=1..1000


MAPLE

with(numtheory); [seq(mroot(2, 3, p), p=1..400)];


PROG

(PARI) is(n)=ispower(Mod(2, n), 3) \\ Charles R Greathouse IV, Apr 05 2012


CROSSREFS

Cf. A057126, A057761.
Sequence in context: A076474 A324968 A255059 * A074243 A302539 A322912
Adjacent sequences: A057757 A057758 A057759 * A057761 A057762 A057763


KEYWORD

nonn


AUTHOR

N. J. A. Sloane, Nov 01 2000


EXTENSIONS

Checked by T. D. Noe, Apr 19 2007


STATUS

approved



