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A028534 Character of extremal vertex operator algebra of rank 13. 0
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

REFERENCES

G. Höhn, Selbstduale Vertexoperatorsuperalgebren und das Babymonster, Bonner Mathematische Schriften, Vol. 286 (1996), 1-85.

LINKS

Table of n, a(n) for n=0..24.

G. Hoehn (gerald(AT)math.ksu.edu), Selbstduale Vertexoperatorsuperalgebren und das Babymonster, Doctoral Dissertation, Univ. Bonn, Jul 15 1995 (pdf, ps).

FORMULA

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

CROSSREFS

Cf. A000700.

Sequence in context: A276980 A214220 A029567 * A279114 A210270 A321035

Adjacent sequences:  A028531 A028532 A028533 * A028535 A028536 A028537

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Sean A. Irvine, Feb 29 2020

STATUS

approved

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Last modified April 15 20:40 EDT 2021. Contains 342977 sequences. (Running on oeis4.)