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A028534
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Character of extremal vertex operator algebra of rank 13.
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0
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1, 0, 273, 2600, 15574, 74152, 298727, 1063296, 3446976, 10372648, 29339830, 78743704, 202029217, 498419352, 1187801472, 2744629160, 6168518954, 13520236184, 28964224276, 60763815944, 125042509293, 252773942408, 502601223072, 984061445952, 1899179849814
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OFFSET
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0,3
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REFERENCES
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G. Höhn, Selbstduale Vertexoperatorsuperalgebren und das Babymonster, Bonner Mathematische Schriften, Vol. 286 (1996), 1-85.
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LINKS
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G. Hoehn (gerald(AT)math.ksu.edu), Selbstduale Vertexoperatorsuperalgebren und das Babymonster, Doctoral Dissertation, Univ. Bonn, Jul 15 1995 (pdf, ps).
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FORMULA
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G.f.: x^(2*r/24) * (B(x)^(2*r) - 2*r*B(x)^(2*r-24) where B(x) = x^(-1/24) * Product_{k>=0} (1+x^(2*k+1)) = x^(-1/24) * A000700 and r = 13. - Sean A. Irvine, Feb 29 2020
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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