Irregular table read by rows: T(n,k) is the number of permutations in S_n that have exactly k occurrences of the pattern 2413. 0 <= k <= A342854(n).
A342860
Irregular table read by rows: T(n,k) is the number of permutations in S_n that have exactly k occurrences of the pattern 2413. 0 <= k <= A342854(n).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =23a(5) =1a(6) =103a(7) =9a(8) =8a(9) =512a(10) =62a(11) =82a(12) =34a(13) =28a(14) =2a(15) =2740a(16) =402a(17) =612a(18) =384a(19) =466a(20) =94a(21) =232a(22) =42a(23) =60a(24) =8a(25) =15485a(26) =2593a(27) =4187a(28) =3036a(29) =4356
External references
- oeis: A342860