347280domain: NAppears in sequencesTheta series of 9-dimensional odd unimodular lattice E_8 + Z.at n=18A071967a(n) = cpg(n, 3) + cpg(n, 4) + ... + cpg(n, n) where cpg(n, m) is the m-th n-th-order centered polygonal number.at n=38A257051