https://mathworld.wolfram.com/TriangularHoneycombAcuteKnightGraph.html
Triangular Honeycomb Acute Knight Graph -- from Wolfram MathWorld
The n-triangular honeycomb acute knight graph N_n (DeMaio and Tran 2013) is a graph consisting of vertices on a triangular honeycomb board with n vertices...
knight graphwolfram mathworldtriangularhoneycombacute