113850domain: NAppears in sequencesDegrees of irreducible representations of Conway group Co2.at n=23A003911Theta series of (putative) extremal 3-modular even lattice in dimension 46.at n=4A034633a(n) = 9*binomial(n,4) = 3*n*(n-1)*(n-2)*(n-3)/8.at n=25A060008Expansion of 30*x*(1 + x) / (1 - x)^4.at n=21A316459