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A028551 Character of extremal vertex operator algebra of rank 23. 0
1, 0, 0, 4646, 93380, 1059794, 8621895, 56103210, 310044370, 1510551680, 6651075761, 26933846630, 101620829275, 360788432800, 1214753145335, 3903008000874, 12028224670920, 35705261501310, 102455800359789, 285054726362240, 770966832733441, 2031593146266830 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

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..21.

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) - r*(47-2*r)*B(x)^(2*r-48) where B(x) = x^(-1/24) * Product_{k>=0} (1+x^(2*k+1)) = x^(-1/24) * A000700 and r = 23. - Sean A. Irvine, Feb 29 2020

CROSSREFS

Cf. A000700.

Sequence in context: A233855 A068268 A227482 * A031615 A122713 A235235

Adjacent sequences:  A028548 A028549 A028550 * A028552 A028553 A028554

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 February 24 21:55 EST 2021. Contains 341592 sequences. (Running on oeis4.)