a(n) = 2^(4*n-4)*(2^n-1).A371193a(n) = 2^(4*n-4)*(2^n-1).Terms a(0) =0a(1) =1a(2) =48a(3) =1792a(4) =61440a(5) =2031616a(6) =66060288a(7) =2130706432a(8) =68451041280External referencesoeis: A371193