If n = Product (p_j^k_j) then a(n) = Product ((-1)^k_j * binomial(n, k_j)).

Terms

a(0) =1a(1) =-2a(2) =-3a(3) =6a(4) =-5a(5) =36a(6) =-7a(7) =-56a(8) =36a(9) =100a(10) =-11a(11) =-792a(12) =-13a(13) =196a(14) =225a(15) =1820a(16) =-17a(17) =-2754a(18) =-19a(19) =-3800a(20) =441a(21) =484a(22) =-23a(23) =48576a(24) =300a(25) =676a(26) =-2925a(27) =-10584a(28) =-29a(29) =-27000