a(n) = A033879(A225546(n)).

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =1a(5) =1a(6) =1a(7) =0a(8) =5a(9) =1a(10) =1a(11) =-4a(12) =1a(13) =1a(14) =1a(15) =4a(16) =1a(17) =-3a(18) =1a(19) =-28a(20) =1a(21) =1a(22) =1a(23) =-12a(24) =41a(25) =1a(26) =-19a(27) =-508a(28) =1a(29) =1