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A326171
Let z be a sequence of distinct Gaussian integers such that z(1) = 0, z(2) = 2+i (where i denotes the imaginary unit), for n > 1, z(n+1) the Gaussian integer with least norm at one knight move from z(n) (in case of a tie, choose the value such that Im(z(n+1)/z(n))>0); a(n) is the imaginary part of z(n).