%I #11 Dec 26 2015 02:02:27
%S 0,0,1,1,2,2,0,0,1,1,3,2,2,0,1,1,0,2,2,0,1,1,0,2,3,0,1,1,0,2,2,0,1,1,
%T 0,2,3,0,1,1,0,2,2,0,1,1,0,2,2,0,1,1,0,2,2,0,1,1,0,2,3,0,1,1,0,2,2,0,
%U 1,1,0,2,2,0
%N Sprague-Grundy sequence G(i-Mark({2,4}, {2})).
%H Eric Sopena, <a href="http://arxiv.org/abs/1509.04199">i-Mark: A new subtraction division game</a>, arXiv:1509.04199 [cs.DM], 2015.
%F For n>=11:
%F a(n) = 0 if n = 1 (mod 6)
%F a(n) = 1 if n = 2 (mod 6)
%F a(n) = 1 if n = 3 (mod 6)
%F a(n) = 0 if n = 4 (mod 6)
%F a(n) = 2 if n = 5 (mod 6)
%F a(n) = 2 if n = 0 (mod 6) and (n/6 is odd or n/6=2^k for even k or (n/6 is not a power of 2 and the largest power of 2 dividing n/6 is an odd power))
%F a(n) = 3 otherwise
%K nonn
%O 0,5
%A _N. J. A. Sloane_, Oct 29 2015
%E More terms and formula from _Nathan Fox_, Dec 22 2015