The first node has valence 3, and after that is is a 4-valent tree, up to depth 4, with two pentagons at each node, so there are 2 * (1 + 3 + 3*4 + 3*4*4 + 3*4*4*4) = 512 pentagons displayed below. 512 is a lot. If your internet connection is slow or you are using a mobile device, this page may load slowly or poorly. I’ll fix it soon.