Triangle read by rows: T(n,k) is the number of length n words over an n-ary alphabet such that the maximal cardinality of C is k, where C is a subset of the alphabet such that all letters in C appear in weakly increasing order within the word.
A387336
Triangle read by rows: T(n,k) is the number of length n words over an n-ary alphabet such that the maximal cardinality of C is k, where C is a subset of the alphabet such that all letters in C appear in weakly increasing order within the word.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =0a(4) =3a(5) =1a(6) =0a(7) =16a(8) =10a(9) =1a(10) =0a(11) =111a(12) =123a(13) =21a(14) =1a(15) =0a(16) =956a(17) =1681a(18) =451a(19) =36a(20) =1a(21) =0a(22) =9797a(23) =25691a(24) =9929a(25) =1183a(26) =55a(27) =1a(28) =0a(29) =116089
External references
- oeis: A387336