a(n) = 2^(4*n+1).A013776a(n) = 2^(4*n+1).Terms a(0) =2a(1) =32a(2) =512a(3) =8192a(4) =131072a(5) =2097152a(6) =33554432a(7) =536870912a(8) =8589934592a(9) =137438953472External referencesoeis: A013776