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Permalink In reply to by Anonymous (not verified)

Authors don't get to pick ISBN numbers. So it is a (very) happy coincidence.

P.S.: A member on my science forum posted the 6174 puzzle (without identifying it to pique curiosity).

I programmed the entire 9999-line output in JavaScript. Then a little research led me here.

It fascinates me that there many be no deeper meaning to this mathematical oddity.

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