Triangle of generalized sum of divisors function, read by rows.

Terms

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