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A213865
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Number of words w where each letter of the n-ary alphabet occurs 5 times 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.
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1
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1, 1, 56, 13326, 7364321, 7236515981, 10915151070941, 23060727168393236, 64157120593526429971, 224909472938181653263446, 961415357313559098150122721, 4886376056824611061263607492146, 28944590736206982153001156958037271, 196631118571992127875305845382720388771
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OFFSET
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0,3
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LINKS
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EXAMPLE
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a(0) = 1: the empty word.
a(1) = 1: aaaaa.
a(2) = 56: aaaaabbbbb, aaaababbbb, ..., baababaabb, baabababab.
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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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