Irregular triangle read by rows: T(n,k) is the number of flattened Catalan words of length n with exactly k symmetric peaks, with k >= 0.

A372883

Irregular triangle read by rows: T(n,k) is the number of flattened Catalan words of length n with exactly k symmetric peaks, with k >= 0.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =1a(4) =9a(5) =5a(6) =23a(7) =17a(8) =1a(9) =63a(10) =51a(11) =8a(12) =176a(13) =149a(14) =39a(15) =1a(16) =491a(17) =439a(18) =153a(19) =11a(20) =1362a(21) =1308a(22) =540a(23) =70a(24) =1a(25) =3762a(26) =3912a(27) =1812a(28) =342a(29) =14

External references