A028535 - OEIS

%I #10 Feb 29 2020 17:46:33

%S 1,0,270,2871,18171,89991,375741,1380456,4602852,14210922,41167332,

%T 112987953,296065548,745155153,1809970083,4259274975,9741874320,

%U 21715729830,47285705676,100777629492,210581716518,432065232288,871606268064,1730764182321,3386501211393

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

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

%H G. Höhn (gerald(AT)math.ksu.edu), Selbstduale Vertexoperatorsuperalgebren und das Babymonster, Doctoral Dissertation, Univ. Bonn, Jul 15 1995 (<a href="http://www.math.ksu.edu/~gerald/papers/dr.pdf">pdf</a>, <a href="http://www.math.ksu.edu/~gerald/papers/dr.ps.gz">ps</a>).

%F 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

%Y Cf. A000700.

%K nonn,easy

%O 0,3

%A _N. J. A. Sloane_.

%E More terms from _Sean A. Irvine_, Feb 29 2020