Design spectra for 6-regular graphs with 12 vertices

The design spectrum of a simple graph $G$ is the set of positive integers $n$ such that there exists an edgewise decomposition of the complete graph $K_n$ into $n(n - 1)/(2 |E(G)|)$ copies of $G$. We compute the design spectra for 7788 6-regular graphs with 12 vertices.Comment: 261 pages. The paper without the appendix will be submitted to a journa