A057760 - OEIS

%I #15 Jul 04 2015 05:13:18

%S 1,2,3,5,6,10,11,15,17,22,23,25,29,30,31,33,34,41,43,46,47,50,51,53,

%T 55,58,59,62,66,69,71,75,82,83,85,86,87,89,93,94,101,102,106,107,109,

%U 110,113,115,118,121,123,125,127,129,131,137,138,141,142

%N Numbers n such that 2 is a cube mod n.

%C Numbers not divisible by 4 or 9 and whose prime divisors are in A040028. - _Eric M. Schmidt_, Jan 25 2014

%H T. D. Noe, <a href="/A057760/b057760.txt">Table of n, a(n) for n=1..1000</a>

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

%o (PARI) is(n)=ispower(Mod(2,n),3) \\ _Charles R Greathouse IV_, Apr 05 2012

%Y Cf. A057126, A057761.

%K nonn

%O 1,2

%A _N. J. A. Sloane_, Nov 01 2000

%E Checked by _T. D. Noe_, Apr 19 2007