a(n) = Sum_{k=0..n} (-1)^(n-k)*A000041(k).

Terms

a(0) =1a(1) =0a(2) =2a(3) =1a(4) =4a(5) =3a(6) =8a(7) =7a(8) =15a(9) =15a(10) =27a(11) =29a(12) =48a(13) =53a(14) =82a(15) =94a(16) =137a(17) =160a(18) =225a(19) =265a(20) =362a(21) =430a(22) =572a(23) =683a(24) =892a(25) =1066a(26) =1370a(27) =1640a(28) =2078a(29) =2487