Number of ordered set partitions of [n] with at most four elements per block.
A276924
Number of ordered set partitions of [n] with at most four elements per block.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =13a(4) =75a(5) =540a(6) =4670a(7) =47110a(8) =543130a(9) =7044450a(10) =101519250a(11) =1609319250a(12) =27830729850a(13) =521397676800
External references
- oeis: A276924