self-descriptive number
Sign in to saveb-digit long integer m in a given base b where each digit d at position n counts how many instances of digit n are in m
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prime number
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figurate number
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automorphic number
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mathematics
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International Standard Book Number
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natural number
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integer
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binary numeral system
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digit
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exponentiation
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numeral system
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three-dimensional space
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natural language
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perfect number
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divisor
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recursion
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permutation
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Q118398
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sorting algorithm
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Mersenne prime
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