A028521 Character of extremal vertex operator algebra of rank 72.

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

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