Hankel transform of A127275.

Terms

a(0) =1a(1) =1a(2) =-2a(3) =-16a(4) =-64a(5) =-208a(6) =-608a(7) =-1664a(8) =-4352a(9) =-11008a(10) =-27136a(11) =-65536a(12) =-155648a(13) =-364544a(14) =-843776a(15) =-1933312a(16) =-4390912a(17) =-9895936a(18) =-22151168a(19) =-49283072a(20) =-109051904a(21) =-240123904a(22) =-526385152a(23) =-1149239296a(24) =-2499805184a(25) =-5419040768