Irregular table read by rows: T(n,k) is the number of permutations in S_n that have exactly k occurrences of the pattern 1324. 0 <= k <= A342853(n).
A342861
Irregular table read by rows: T(n,k) is the number of permutations in S_n that have exactly k occurrences of the pattern 1324. 0 <= k <= A342853(n).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =23a(5) =1a(6) =103a(7) =10a(8) =6a(9) =1a(10) =513a(11) =75a(12) =74a(13) =26a(14) =17a(15) =9a(16) =6a(17) =2762a(18) =522a(19) =645a(20) =321a(21) =290a(22) =130a(23) =166a(24) =47a(25) =54a(26) =48a(27) =41a(28) =4a(29) =8
External references
- oeis: A342861