Hankel transform of A128057.

Terms

a(0) =1a(1) =-3a(2) =-6a(3) =28a(4) =56a(5) =-288a(6) =-576a(7) =3008a(8) =6016a(9) =-31488a(10) =-62976a(11) =329728a(12) =659456a(13) =-3452928a(14) =-6905856a(15) =36159488a(16) =72318976a(17) =-378667008a(18) =-757334016a(19) =3965452288a(20) =7930904576a(21) =-41526755328a(22) =-83053510656a(23) =434873827328