Hankel transform of A165203.

Terms

a(0) =1a(1) =-5a(2) =-21a(3) =-21a(4) =89a(5) =377a(6) =377a(7) =-1597a(8) =-6765a(9) =-6765a(10) =28657a(11) =121393a(12) =121393a(13) =-514229a(14) =-2178309a(15) =-2178309a(16) =9227465a(17) =39088169a(18) =39088169a(19) =-165580141a(20) =-701408733a(21) =-701408733a(22) =2971215073a(23) =12586269025a(24) =12586269025a(25) =-53316291173a(26) =-225851433717a(27) =-225851433717