a(n) = A008544(n) * Sum_{k=0..n} 1/A008544(k).
A368791
a(n) = A008544(n) * Sum_{k=0..n} 1/A008544(k).
Terms
- a(0) =1a(1) =3a(2) =16a(3) =129a(4) =1420a(5) =19881a(6) =337978a(7) =6759561a(8) =155469904a(9) =4042217505a(10) =117224307646
External references
- oeis: A368791