The Formula section of A085469 gives a formula of the form Sum_{i, j, k not all 0} f(i,j,k) (In this case, f(i,j,k) = (-1)^(i+j+k)/sqrt(i^2+j^2+k^2).) Is there a similar formula (differing only in its function f(i,j,k)) for A181152, A182565, A182566, or A182567? Thanks! -- Jon