Shifts 4 places left under Dirichlet convolution.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =2a(6) =2a(7) =3a(8) =2a(9) =6a(10) =4a(11) =8a(12) =5a(13) =14a(14) =8a(15) =22a(16) =10a(17) =32a(18) =18a(19) =51a(20) =20a(21) =72a(22) =36a(23) =116a(24) =44a(25) =152a(26) =72a(27) =258a(28) =89a(29) =314