a(1) = 1; a(n+1) = n! * Sum_{d|n} a(d)/d where the sum is over the positive divisors d of n.
A068099
a(1) = 1; a(n+1) = n! * Sum_{d|n} a(d)/d where the sum is over the positive divisors d of n.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =12a(4) =108a(5) =2712a(6) =327240a(7) =235617840
External references
- oeis: A068099