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A011817
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M-sequences from multicomplexes on 4 variables with all monomials of degree 9 but none of degree larger than n.
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0
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0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 287, 49414, 6721391, 803816457, 89294859907, 9517387613809, 993526926534580, 102994962998587912, 10705388607233154107, 1123359305409427947266
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OFFSET
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0,11
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REFERENCES
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S. Linusson, The number of M-sequences and f-vectors, Combinatorica, 19 (1999), 255-266.
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LINKS
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FORMULA
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a(n) = Sum_{k=9..n} L(4, n, k) where L(p, n, k) = Sum_{i=k..n} L(p-1, n, i) * L(p, i-1, k-1) with boundary conditions L(p, n, n) = L(p, n, -1) = 1 (p >= 0, n >= -1), L(0, n, k) = 0 (0 <= k < n) [from Linusson]. - Sean A. Irvine, Jun 28 2018
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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Svante Linusson (linusson(AT)math.kth.se)
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EXTENSIONS
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STATUS
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approved
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