Totally multiplicative sequence with a(p) = (p+1)*(p-3) = p^2-2p-3 for prime p.

Terms

a(0) =1a(1) =-3a(2) =0a(3) =9a(4) =12a(5) =0a(6) =32a(7) =-27a(8) =0a(9) =-36a(10) =96a(11) =0a(12) =140a(13) =-96a(14) =0a(15) =81a(16) =252a(17) =0a(18) =320a(19) =108a(20) =0a(21) =-288a(22) =480a(23) =0a(24) =144a(25) =-420a(26) =0a(27) =288a(28) =780a(29) =0