47241632

Appears in sequences

• Number of words covering the alphabet [n] that are irreducible with respect to C, with |C| = 1.at n=8A390275
• Triangle read by rows: T(n,k) is the number of irreducible words covering the alphabet [n] 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.at n=46A390670