131880275664domain: NAppears in sequencesTheta series of lattice D20+.at n=20A014747Theta series of D_20 lattice.at n=10A022051Theta series of D*_20 lattice.at n=20A022073Number of ways of writing n as a sum of n squares.at n=20A066535Expansion of theta_4(q)^20 in powers of q = exp(Pi i t).at n=20A319308