The Numbers a 2 + b 2 − dc 2 Andrzej Nowicki Nicolaus Copernicus
نویسنده
چکیده
We say that a positive integer d is special if for every integer m there exist nonzero integers a, b, c such that m = a2+ b2− dc2. In this note we present examples and some properties of special numbers. Moreover, we present an infinite sequence of special numbers.
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