a(n) = n! * Sum_{k=1..n} ( Sum_{d|k} d^(k/d + 1) )/k.
A353992
a(n) = n! * Sum_{k=1..n} ( Sum_{d|k} d^(k/d + 1) )/k.
Terms
- a(0) =1a(1) =7a(2) =41a(3) =314a(4) =2194a(5) =22764a(6) =195348a(7) =2374224a(8) =27940176a(9) =384636960a(10) =4673720160a(11) =95522440320
External references
- oeis: A353992