a(n) = A048106(A001405(n)).

Terms

a(0) =1a(1) =2a(2) =2a(3) =4a(4) =4a(5) =2a(6) =4a(7) =8a(8) =4a(9) =-2a(10) =16a(11) =8a(12) =8a(13) =0a(14) =8a(15) =16a(16) =32a(17) =16a(18) =32a(19) =16a(20) =32a(21) =0a(22) =64a(23) =32a(24) =-16a(25) =-64a(26) =-160a(27) =-256a(28) =-128a(29) =-224