a(1) = 1; a(n) = -Sum_{d|n, d < n} A341512(n/d) * a(d), where A341512(n) = sigma(n)*A003961(n) - n*sigma(A003961(n)).

A347096

a(1) = 1; a(n) = -Sum_{d|n, d < n} A341512(n/d) * a(d), where A341512(n) = sigma(n)*A003961(n) - n*sigma(A003961(n)).

Terms

    a(0) =1a(1) =-1a(2) =-2a(3) =-10a(4) =-2a(5) =-32a(6) =-4a(7) =-64a(8) =-42a(9) =-54a(10) =-2a(11) =-214a(12) =-4a(13) =-112a(14) =-112a(15) =-316a(16) =-2a(17) =-469a(18) =-4a(19) =-412a(20) =-232a(21) =-168a(22) =-6a(23) =-792a(24) =-90a(25) =-262a(26) =-612a(27) =-860a(28) =-2a(29) =-1208

External references