T(n,k) gives the number of permutations of the set [n] that contain k occurrences of the subword (132); irregular array read by rows (n >= 0 and 0 <= k <= max(0, floor((n-1)/2))).
A197365
T(n,k) gives the number of permutations of the set [n] that contain k occurrences of the subword (132); irregular array read by rows (n >= 0 and 0 <= k <= max(0, floor((n-1)/2))).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =1a(5) =16a(6) =8a(7) =63a(8) =54a(9) =3a(10) =296a(11) =368a(12) =56a(13) =1623a(14) =2649a(15) =753a(16) =15a(17) =10176a(18) =20544a(19) =9024a(20) =576a(21) =71793a(22) =172596a(23) =104814a(24) =13572a(25) =105a(26) =562848a(27) =1569408a(28) =1228608a(29) =259968
External references
- oeis: A197365