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A294997
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Numbers n such that the largest digit of n^3 is 7.
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3
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3, 14, 15, 23, 26, 30, 54, 55, 56, 63, 65, 67, 78, 91, 105, 111, 121, 126, 133, 135, 137, 140, 147, 150, 163, 167, 168, 173, 176, 188, 197, 226, 230, 245, 256, 258, 260, 273, 276, 291, 293, 295, 300, 318, 321, 343, 346, 375, 376, 385, 386, 397, 415, 417, 418, 424, 425, 488, 497
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OFFSET
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1,1
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COMMENTS
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For any term a(n), all numbers of the form a(n)*10^k, k >= 0, are in this sequence. We could call "primitive" the terms not of this form, i.e., without trailing '0'.
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LINKS
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EXAMPLE
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3 is in the sequence because the largest digit of 3^3 = 27 is 7.
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MATHEMATICA
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Select[Range[500], Max[IntegerDigits[#^3]]==7&] (* Harvey P. Dale, Sep 10 2019 *)
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PROG
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(PARI) for(n=1, 2e3, vecmax(digits(n^3))==7&&print1(n", "))
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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