

A322575


z(1) = 0, and for any n > 0, z(4*n2) = z(n) + k(n), z(4*n1) = z(n) + i*k(n), z(4*n) = z(n)  k(n) and z(4*n+1) = z(n)  i*k(n) where k(n) is the least positive integer not leading to a duplicate term in sequence z (and i denotes the imaginary unit); a(n) is the imaginary part of z(n).


3



0, 0, 1, 0, 1, 0, 3, 0, 3, 1, 4, 1, 2, 0, 3, 0, 3, 1, 2, 1, 4, 0, 1, 0, 1, 3, 4, 3, 2, 0, 8, 0, 8, 3, 2, 3, 4, 1, 5, 1, 3, 4, 13, 4, 5, 1, 2, 1, 0, 2, 5, 2, 9, 0, 7, 0, 7, 3, 7, 3, 1, 0, 11, 0, 11, 3, 2, 3, 8, 1, 4, 1, 6, 2, 10, 2
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