The n-th term of the n-th Dirichlet self-convolution equals n^2.

Terms

a(0) =1a(1) =2a(2) =3a(3) =-2a(4) =5a(5) =-24a(6) =7a(7) =-20a(8) =-27a(9) =-80a(10) =11a(11) =-54a(12) =13a(13) =-168a(14) =-195a(15) =-394a(16) =17a(17) =-288a(18) =19a(19) =-170a(20) =-399a(21) =-440a(22) =23a(23) =-9360a(24) =-275a(25) =-624a(26) =-792a(27) =-350a(28) =29a(29) =-2580