a(n) = n! * Sum_{d|n} H(d)*H(n/d), where H(n) is the n-th harmonic number.
A193445
a(n) = n! * Sum_{d|n} H(d)*H(n/d), where H(n) is the n-th harmonic number.
Terms
- a(0) =1a(1) =6a(2) =22a(3) =154a(4) =548a(5) =7488a(6) =26136a(7) =471168a(8) =3272832a(9) =46114560a(10) =241087680a(11) =10152587520a(12) =39605518080
External references
- oeis: A193445