A029723 - OEIS

A029723

Trace of Frobenius of the reduction mod 2 of the elliptic curve C / L, L a lattice with Gram matrix [ 4 1; 1 2n ].

%I #5 Dec 09 2007 03:00:00

%S 1,1,3,1,5,9,3,1,21,7,13,13,5

%N Trace of Frobenius of the reduction mod 2 of the elliptic curve C / L, L a lattice with Gram matrix [ 4 1; 1 2n ].

%F Of form sqrt(2^(h(1-8n)+2)-m^2(8n-1)), with m odd.

%K nonn

%O 0,3

%A Eric Rains (rains(AT)caltech.edu)