a(n) is the number of singleton commuting ordered set partitions.
A376544
a(n) is the number of singleton commuting ordered set partitions.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =8a(4) =40a(5) =242a(6) =1784a(7) =15374a(8) =151008a(9) =1669010a(10) =20503768a(11) =277049126a(12) =4083693200a(13) =65211041690
External references
- oeis: A376544