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A213294
Number of n-length words w over 6-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
1, 6, 36, 171, 711, 2506, 8151, 25781, 83728, 273248, 916966, 3121506, 10934875, 38945256, 142403783, 529393936, 2014819829, 7790840332, 30758499541, 123255094820, 503078455794, 2081817569353, 8756613613322, 37300624224737, 161213532001916, 704851308055768
OFFSET
0,2
CROSSREFS
Column k=6 of A213276.
Sequence in context: A351783 A190065 A293068 * A293886 A132165 A200573
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Jun 08 2012
STATUS
approved