Triangle read by rows: T(n,k) is the number of permutations of k elements from [1..n] without consecutive adjacent values.
A338526
Triangle read by rows: T(n,k) is the number of permutations of k elements from [1..n] without consecutive adjacent values.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =0a(6) =1a(7) =3a(8) =2a(9) =0a(10) =1a(11) =4a(12) =6a(13) =4a(14) =2a(15) =1a(16) =5a(17) =12a(18) =18a(19) =20a(20) =14a(21) =1a(22) =6a(23) =20a(24) =48a(25) =90a(26) =124a(27) =90a(28) =1a(29) =7
External references
- oeis: A338526