A028535 - OEIS

A028535

Character of extremal vertex operator algebra of rank 27/2.

1, 0, 270, 2871, 18171, 89991, 375741, 1380456, 4602852, 14210922, 41167332, 112987953, 296065548, 745155153, 1809970083, 4259274975, 9741874320, 21715729830, 47285705676, 100777629492, 210581716518, 432065232288, 871606268064, 1730764182321, 3386501211393

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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. Höhn (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 = 27/2. - Sean A. Irvine, Feb 29 2020

CROSSREFS

Cf. A000700.

Sequence in context: A029770 A028529 A109025 * A108094 A162007 A289136

Adjacent sequences: A028532 A028533 A028534 * A028536 A028537 A028538

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Sean A. Irvine, Feb 29 2020

STATUS

approved