a(n) = Sum_{k=1..n} (-1)^k*k^n*floor(n/k).
A366919
a(n) = Sum_{k=1..n} (-1)^k*k^n*floor(n/k).
Terms
- a(0) =-1a(1) =2a(2) =-22a(3) =203a(4) =-2285a(5) =33855a(6) =-609345a(7) =12420372a(8) =-284964519a(9) =7347342215a(10) =-209807114169
External references
- oeis: A366919