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تسجيل

VR Number

المؤلف:  Madachy, J. S.

المصدر:  Madachy,s Mathematical Recreations. New York: Dover

الجزء والصفحة:  pp. 165-171

20-11-2020

977

VR Number

A "visual representation" number which is a sum of some simple function of its digits. For example,

			(1)
			(2)
			(3)
			(4)
			(5)
			(6)

are all VR numbers given by Madachy (1979), where  is a factorial and  is a subfactorial.

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REFERENCES:

Madachy, J. S. Madachy's Mathematical Recreations. New York: Dover, pp. 165-171, 1979.