1031914domain: NAppears in sequencesTheta series of D*_13 lattice.at n=36A022066Number of ways of writing n as a sum of 13 squares.at n=9A276285Expansion of 1/(1 - x) * Product_{k>=0} 1/(1 - x^(4^k))^(4^(k+1)).at n=20A321345