Great! Somehow reminds me the Bailey–Borwein–Plouffe formula for computing the nth PI digit <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Bailey%E2%80%93Borwein%E2%80%93Plouffe_formula" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Bailey%E2%80%93Borwein%E2%80%9...</a>