Inverse binomial transform of 1, 2, 2, 4, 10, 20, ... = A100088.

Terms

a(0) =1a(1) =1a(2) =-1a(3) =3a(4) =-1a(5) =-1a(6) =7a(7) =-9a(8) =7a(9) =7a(10) =-25a(11) =39a(12) =-25a(13) =-25a(14) =103a(15) =-153a(16) =103a(17) =103a(18) =-409a(19) =615a(20) =-409a(21) =-409a(22) =1639a(23) =-2457a(24) =1639a(25) =1639a(26) =-6553a(27) =9831a(28) =-6553a(29) =-6553