a(1) = -1, for n > 1, a(n) = Sum_{d|n, d<n} A340197(n/d) * a(d).

Terms

a(0) =-1a(1) =0a(2) =0a(3) =-2a(4) =0a(5) =-7a(6) =0a(7) =-6a(8) =-6a(9) =-13a(10) =0a(11) =-13a(12) =0a(13) =-19a(14) =-22a(15) =-22a(16) =0a(17) =-19a(18) =0a(19) =-23a(20) =-32a(21) =-31a(22) =0a(23) =-81a(24) =-20a(25) =-37a(26) =-24a(27) =-33a(28) =0a(29) =-21