Number of preferential arrangements of n labeled elements when at least k=3 elements per rank are required.

A102233

Number of preferential arrangements of n labeled elements when at least k=3 elements per rank are required.

Terms

    a(0) =1a(1) =0a(2) =0a(3) =1a(4) =1a(5) =1a(6) =21a(7) =71a(8) =183a(9) =2101a(10) =13513a(11) =64285a(12) =629949a(13) =5762615a(14) =41992107a(15) =427215283a(16) =4789958371a(17) =47283346849a(18) =540921904725

External references