The density of states was calculated by taking 4 × 10^{6} evenly distrubuted points in the first Brillouin zone, calculating the energy of the points, and plotting the distribution of the resulting energies. Since there are 2 states per atom, the integral of the density of states over the whole band should be 2.

The tightbinding dispersion relation for a simple cubic crystal can be found here. In this calculation, ε and t are arbitrary parameters.
The Mathlab files used to generate the density of states are dosCubic.m, genKVectorsCubic.m, and plotDOS.m.
The density of states is tabulated in eV^{1} atom^{1} and eV^{1} m^{2} below. The data in the right column can be copied and pasted into one to the pages that calculate the temperature dependence of thermodynamic quantities.