Number of preferential arrangements of n labeled elements when at least k=5 elements per rank are required.

A245790

Number of preferential arrangements of n labeled elements when at least k=5 elements per rank are required.

Terms

    a(0) =1a(1) =0a(2) =0a(3) =0a(4) =0a(5) =1a(6) =1a(7) =1a(8) =1a(9) =1a(10) =253a(11) =925a(12) =2509a(13) =6007a(14) =13443a(15) =785643a(16) =6114551a(17) =31980469a(18) =138704361a(19) =539262713a(20) =13685913105a(21) =170996304653

External references