Number of rooted factorizations of n-permutations into ordered cycles.
A218817
Number of rooted factorizations of n-permutations into ordered cycles.
Terms
- a(0) =0a(1) =1a(2) =6a(3) =42a(4) =352a(5) =3470a(6) =39468a(7) =509544a(8) =7367232a(9) =117981792a(10) =2073609120a(11) =39690563616a(12) =821945839680
External references
- oeis: A218817