Composite numbers m such that m divides Sum_{k=1..m-1} (lcm(1,2,...,(m-1)) / k)^2.
A309556
Composite numbers m such that m divides Sum_{k=1..m-1} (lcm(1,2,...,(m-1)) / k)^2.
Terms
- a(0) =52781a(1) =782957a(2) =1395353a(3) =2602439
External references
- oeis: A309556