Product of number of involutions on n letters and number of partitions of n.
A104708
Product of number of involutions on n letters and number of partitions of n.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =50a(5) =182a(6) =836a(7) =3480a(8) =16808a(9) =78600a(10) =398832a(11) =1998976a(12) =10791704a(13) =57418904a(14) =322714800a(15) =1821518336a(16) =10673756016a(17) =62904395664a(18) =383965822240
External references
- oeis: A104708