G.f. A(x) satisfies: A(x) = x - Sum_{k>=2} sigma(k) * A(x)^k.
A333956
G.f. A(x) satisfies: A(x) = x - Sum_{k>=2} sigma(k) * A(x)^k.
Terms
- a(0) =1a(1) =-3a(2) =14a(3) =-82a(4) =546a(5) =-3932a(6) =29816a(7) =-234438a(8) =1893469a(9) =-15612527a(10) =130870098a(11) =-1111844944a(12) =9552257052a(13) =-82846987926a(14) =724385135208
External references
- oeis: A333956