A213292 Number of n-length words w over 4-ary alphabet such that 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.

1, 4, 16, 46, 118, 276, 712, 1805, 4895, 13280, 37993, 109386, 328219, 992413, 3101399, 9764376, 31580645, 102797899, 342075208, 1144125506, 3896297053, 13319243655, 46206520968, 160729837020, 565901313043, 1996113320841, 7111795754941, 25369213794266

Offset: 0

Author

Alois P. Heinz, Jun 08 2012

Keywords

• nonn

Links

• Alois P. Heinz, Table of n, a(n) for n = 0..130

Crossrefs

Column k=4 of A213276.