T(n,k) is the number of n element 1..n arrays with each element the minimum of k adjacent elements of a permutation of 1..n+k-1 of n+k-1 elements.
A217891
T(n,k) is the number of n element 1..n arrays with each element the minimum of k adjacent elements of a permutation of 1..n+k-1 of n+k-1 elements.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =1a(4) =3a(5) =6a(6) =1a(7) =3a(8) =10a(9) =24a(10) =1a(11) =3a(12) =11a(13) =40a(14) =120a(15) =1a(16) =3a(17) =11a(18) =44a(19) =182a(20) =720a(21) =1a(22) =3a(23) =11a(24) =45a(25) =192a(26) =938a(27) =5040a(28) =1a(29) =3
External references
- oeis: A217891