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A028543 Character of extremal vertex operator algebra of rank 19. 0
1, 0, 0, 6726, 51490, 522538, 2819011, 15598126, 66776089, 278409356, 1012789015, 3553473100, 11459870045, 35680739958, 104848228086, 298518570528, 814386983257, 2161013972842, 5546772124012, 13896849891232, 33892153400144, 80925183641844, 188938349276850 (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..22.

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 = 19. - Sean A. Irvine, Feb 29 2020

CROSSREFS

Cf. A000700.

Sequence in context: A345838 A237041 A031580 * A145320 A035905 A099778

Adjacent sequences:  A028540 A028541 A028542 * A028544 A028545 A028546

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 September 28 06:57 EDT 2021. Contains 347703 sequences. (Running on oeis4.)