Partial alternating sums of the sum of unitary divisors function (A034448).

Terms

a(0) =1a(1) =-2a(2) =2a(3) =-3a(4) =3a(5) =-9a(6) =-1a(7) =-10a(8) =0a(9) =-18a(10) =-6a(11) =-26a(12) =-12a(13) =-36a(14) =-12a(15) =-29a(16) =-11a(17) =-41a(18) =-21a(19) =-51a(20) =-19a(21) =-55a(22) =-31a(23) =-67a(24) =-41a(25) =-83a(26) =-55a(27) =-95a(28) =-65a(29) =-137