-1431655765domain: ZAppears in sequencesExpansion of 1/((1-x)*(1+2*x)).at n=31A077925A generalized Jacobsthal sequence.at n=32A083943a(n) = -5*a(n-1)-4*a(n-2) with n>1, a(0)=0, a(1)=1.at n=16A084241