Sum of the divisors of 11^n-1.

Terms

a(0) =18a(1) =360a(2) =2880a(3) =46128a(4) =299646a(5) =7113600a(6) =35893440a(7) =686393568a(8) =5105934720a(9) =80436972240a(10) =513593801496