Regular triangle read by rows, T(n,k) is the number of derangements of [n] with exactly k right-to-left minima, for n >= 2 and 1 <= k <= n-1.
A344437
Regular triangle read by rows, T(n,k) is the number of derangements of [n] with exactly k right-to-left minima, for n >= 2 and 1 <= k <= n-1.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =5a(5) =1a(6) =11a(7) =21a(8) =11a(9) =1a(10) =53a(11) =113a(12) =79a(13) =19a(14) =1a(15) =309a(16) =715a(17) =589a(18) =211a(19) =29a(20) =1a(21) =2119a(22) =5235a(23) =4835a(24) =2141a(25) =461a(26) =41a(27) =1a(28) =16687a(29) =43507
External references
- oeis: A344437