https://www.wolframalpha.com/input?i=Sierpinski+gasket
Sierpinski gasket - Wolfram|Alpha
sierpinski gasketwolframalpha
https://arxiv.org/abs/cond-mat/9504022
[cond-mat/9504022] Sandpile Model on Sierpinski Gasket Fractal
Abstract page for arXiv paper cond-mat/9504022: Sandpile Model on Sierpinski Gasket Fractal
sandpile modelsierpinski gasketcondmatfractal