A028521 - OEIS

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A028521

Character of extremal vertex operator algebra of rank 72.

1, 0, 1, 1, 2593096794, 12756091394048, 9529321553850114, 2622941179303182336, 378428749730548169825, 34379738369586404335616, 2195434131999069551809023, 105922359560085772186288128, 4060690624559117077119316890

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OFFSET

0,5

REFERENCES

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

F. L. Williams, The role of the Patterson-Selberg zeta function of a hyperbolic cylinder in three-dimensional gravity with a negative cosmological constant, A Window Into Zeta and Modular Physics, MSRI Publications, Vol. 57, 2010.

LINKS

Table of n, a(n) for n=0..12.

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

FORMULA

For n>=4, a(n)=A000521(m)+3*sum_{d>0, d|3, d|m}(A000521(3 * m / d^2)/d) where m=n-3. - Sean A. Irvine, Mar 24 2013

CROSSREFS

Sequence in context: A271105 A134439 A288844 * A064163 A022230 A358483

Adjacent sequences: A028518 A028519 A028520 * A028522 A028523 A028524

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Sean A. Irvine, Mar 24 2013

STATUS

approved