a(n) = 2^n * n! * [x^n](exp(2*x) * BesselI(1, x)).

Terms

a(0) =0a(1) =1a(2) =8a(3) =51a(4) =304a(5) =1770a(6) =10224a(7) =58947a(8) =340064a(9) =1964862a(10) =11374000a(11) =65966318a(12) =383289504a(13) =2230877428a(14) =13005037920a(15) =75923905635a(16) =443837331648