A321841 Number of words w of length n such that each letter of the quinary alphabet is used at least once and for every prefix z of w we have #(z,a_i) = 0 or #(z,a_i) >= #(z,a_j) for all j>i and #(z,a_i) counts the occurrences of the i-th letter in z.

120, 360, 1470, 4872, 17649, 60465, 218360, 779649, 2878543, 10662640, 40402105, 154308568, 599106195, 2346709225, 9308176915, 37232621263, 150428771629, 612404221280, 2513790671891, 10388482748377, 43231607141305, 180987402799559, 762252080995334

Offset

5,1

Links

Table of n, a(n) for n=5..27.

Crossrefs

Column k=5 of A257783.

Sequence in context: A242845 A234915 A061218 * A052778 A354625 A354624

Adjacent sequences: A321838 A321839 A321840 * A321842 A321843 A321844

Keyword

nonn

Author

Alois P. Heinz, Nov 19 2018

Status

approved