a(n) = n! * Sum_{k=1..n} ( Sum_{d|k} d^(k/d + 1) )/(k * (n-k)!).
A354340
a(n) = n! * Sum_{k=1..n} ( Sum_{d|k} d^(k/d + 1) )/(k * (n-k)!).
Terms
- a(0) =1a(1) =7a(2) =38a(3) =264a(4) =1629a(5) =16075a(6) =122366a(7) =1414952a(8) =16076913a(9) =213998983a(10) =2112313774a(11) =53581378400a(12) =664573162941
External references
- oeis: A354340