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Sierpiński's constant is a mathematical constant usually denoted as K. One way of defining it is by limiting the expression:
where r2(k) is a number of representations of k as a sum of the form a2 + b2 for natural a and b.
It can be given in closed form as:
- http://www.plouffe.fr/simon/constants/sierpinski.txt - Sierpiński's constant up to 2000th decimal digit.
- Weisstein, Eric W. "Sierpinski Constant". MathWorld.
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