Triangle T(n,k) (n >= 1, 0<=k<=n) giving number of preferential arrangements of n things beginning with k (transposed, then read by rows).

A054255

Triangle T(n,k) (n >= 1, 0<=k<=n) giving number of preferential arrangements of n things beginning with k (transposed, then read by rows).

Terms

    a(0) =1a(1) =1a(2) =2a(3) =2a(4) =5a(5) =6a(6) =6a(7) =18a(8) =25a(9) =26a(10) =24a(11) =84a(12) =134a(13) =149a(14) =150a(15) =120a(16) =480a(17) =870a(18) =1050a(19) =1081a(20) =1082a(21) =720a(22) =3240a(23) =6600a(24) =8700a(25) =9302a(26) =9365a(27) =9366a(28) =5040a(29) =25200

External references