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A240614
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Number of n-length words w over an 8-ary alphabet such that w is empty or a prefix z concatenated with letter a_i and i=1 or 0 < #(z,a_{i-1}) >= #(z,a_i), where #(z,a_i) counts the occurrences of the i-th letter in z.
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1
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1, 1, 2, 5, 14, 46, 165, 651, 2771, 12637, 61352, 314472, 1691635, 9472308, 54830409, 325818836, 1975978117, 12171736767, 75862916184, 477079866910, 3020725897374, 19228274412487, 122916363687789, 788480233155175, 5073010198556052, 32724394668837491
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OFFSET
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0,3
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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