Erroneous version of A269484.

Terms

a(0) =0a(1) =1a(2) =2a(3) =6a(4) =25a(5) =114a(6) =591a(7) =3297a(8) =19528a(9) =120670a(10) =7712276a(11) =5061164a(12) =33940023