Bailey–Borwein–Plouffe Iterations
05AB1E, 63 52 50 bytes

Specialization formula

Îƒ0NU62201122vyÍ¹Ì°*8X*N&gt;+÷+}16Xm÷+DX&gt;£X__iÀ'.ìÁ},


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BBP formula

ƒ4¹&gt;°UX*8N*©&gt;÷YX*®4+÷-1X*®5+÷-1X*®6+÷-1X*16Nm÷*ODN&gt;£N__iÀ'.ìÁ},


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