a(n) = Sum_{k<=10^n} d(k^2), where d(k^2) = number of divisors function A000005 for k^2.
A390442
a(n) = Sum_{k<=10^n} d(k^2), where d(k^2) = number of divisors function A000005 for k^2.
Terms
- a(0) =1a(1) =48a(2) =1194a(3) =22502a(4) =363982a(5) =5351260a(6) =73858790a(7) =974287906a(8) =12422233000a(9) =154239024036
External references
- oeis: A390442