184965domain: NAppears in sequencesa(n) = (6*n+1)*(6*n+3)*(6*n+5).at n=9A001520a(n) = (2*n+1)*(2*n+3)*(2*n+5).at n=27A061550a(n) = (4*n+3)*(4*n+5)*(4*n+7).at n=13A133767Coefficient of x in the reduction by (x^2 -> x+1) of the polynomial p(n,x) given in Comments.at n=10A192882a(n) = A144066(n+3,3).at n=8A341597