A057760 Numbers n such that 2 is a cube mod n.

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

Offset: 1

Author

N. J. A. Sloane, Nov 01 2000

Keywords

• nonn

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

Crossrefs

Cf. A057126, A057761.

Programs

Maple

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

PARI

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

Extensions

Checked by T. D. Noe, Apr 19 2007