In this paper, we show that the crossing number of the complete tripartite graph \(K_{2,4,n}\) is \(6\left\lfloor\frac{n}{2}\right\rfloor \left\lfloor\frac{n-1}{2}\right\rfloor+2n\).
Citation
Pak Tung Ho. The Crossing Number of \(K_{2,4,n}\)[J], Ars Combinatoria, Volume 109. 527-537. .