a(n) = n*2^(2*n-1).

Terms

a(0) =0a(1) =2a(2) =16a(3) =96a(4) =512a(5) =2560a(6) =12288a(7) =57344a(8) =262144a(9) =1179648a(10) =5242880a(11) =23068672a(12) =100663296a(13) =436207616a(14) =1879048192a(15) =8053063680a(16) =34359738368a(17) =146028888064a(18) =618475290624