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trimorphic numbers

A trimorphic number is a positive integer whose cube ends with the number itself in decimal notation. Zero is excluded here.

The first few trimorphic numbers are: 4, 5, 6, 9, 24, 25, 49, 51, 75, 76, 99, …

60 of the first one million positive integers are trimorphic.

Learn more about trimorphic numbers on wikipedia.

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