3,2

T. W. Cusick and P. Stanica, Fast Evaluation, Weights and Nonlinearity of Rotation-Symmetric Functions, Discr. Math. 258 (2002), 289-301.

a(n+3) = 2*a(n+1)+2*a(n)+2^n; G.f.: -[ (8*x^6)/(1-2*x)+x^3+*x^4+4*x^5 ]/(-1+2*x^2+2*x^3)

a(3)=1 since the rotation-symmetric function x_1*x_2*x_3 has Hamming weight 1. a(4)=4 since the rotation-symmetric function x_1*x_2*x_3+x_2*x_3*x_4+x_3*x_4*x_1+x_4*x_1*x_2 has Hamming weight 4.

Sequence in context: A088810 A005199 A107390 this_sequence A064403 A060667 A005959

Adjacent sequences: A051250 A051251 A051252 this_sequence A051254 A051255 A051256

nice,hard,nonn

Pantelimon Stanica (stanpan(AT)sciences.aum.edu)