a(n) = (-1)^(n-1) + Sum_{d|n, d>1} binomial(a(n/d) + d - 1, d).

Terms

a(0) =1a(1) =0a(2) =2a(3) =0a(4) =2a(5) =3a(6) =2a(7) =0a(8) =6a(9) =3a(10) =2a(11) =11a(12) =2a(13) =3a(14) =12a(15) =0a(16) =2a(17) =38a(18) =2a(19) =11a(20) =14a(21) =3a(22) =2a(23) =90a(24) =8a(25) =3a(26) =68a(27) =11a(28) =2a(29) =127