Hankel transform of A000265 (odd part of n).

Terms

a(0) =1a(1) =2a(2) =-12a(3) =-8a(4) =544a(5) =-2656a(6) =-16320a(7) =141696a(8) =724224a(9) =-6796288a(10) =-7730176a(11) =319698944a(12) =221900800a(13) =-6301081600a(14) =-44793036800