Character of extremal vertex operator algebra of rank 15.5.

Terms

a(0) =1a(1) =0a(2) =248a(3) =3875a(4) =31124a(5) =181753a(6) =871627a(7) =3623869a(8) =13496501a(9) =46070247a(10) =146447007a(11) =438436131a(12) =1246840863a(13) =3390992753a(14) =8867414995a(15) =22393107641a(16) =54807572758a(17) =130403285724a(18) =302393467628a(19) =684927912490