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A057372
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Numbers k that can be expressed as k = w + x = y*z with w*x = y^3 + z^3 where w, x, y, and z are all positive integers.
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5
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64, 81, 96, 140, 153, 162, 288, 294, 561, 588, 972, 1056, 1250, 1344, 1881, 2070, 2205, 2880, 3125, 3168, 5073, 5100, 7500, 7776, 7840, 10206, 11466, 11481, 11840, 15680, 16416, 19360, 20384, 21250, 22833, 24300, 25070, 27500, 27885, 31008, 32805, 33600, 37664
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OFFSET
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1,1
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LINKS
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PROG
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(PARI) is(k) = fordiv(k, y, if(issquare(k^2 - 4*y^3 - 4*(k/y)^3), return(1))); 0; \\ Jinyuan Wang, May 02 2021
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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