Exponential self-convolution of Pell numbers (divided by 2).

Terms

a(0) =0a(1) =0a(2) =1a(3) =6a(4) =32a(5) =160a(6) =784a(7) =3808a(8) =18432a(9) =89088a(10) =430336a(11) =2078208a(12) =10035200a(13) =48455680a(14) =233967616a(15) =1129701376a(16) =5454692352a(17) =26337607680a(18) =127169265664a(19) =614027624448