a(n) = Sum_{k=1..n} (k-1)^n * Sum_{j=1..floor(n/k)} j^2.
A356244
a(n) = Sum_{k=1..n} (k-1)^n * Sum_{j=1..floor(n/k)} j^2.
Terms
- a(0) =0a(1) =1a(2) =9a(3) =102a(4) =1304a(5) =20784a(6) =377286a(7) =7934693a(8) =186969913a(9) =4918785791a(10) =142381832107
External references
- oeis: A356244