a(n) = A003266(n)^2.A382910a(n) = A003266(n)^2.Terms a(0) =1a(1) =1a(2) =1a(3) =4a(4) =36a(5) =900a(6) =57600a(7) =9734400a(8) =4292870400External referencesoeis: A382910