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A057372 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. 5
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..43.

PROG

(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

CROSSREFS

Cf. A057369, A057370, A057371, A057373, A057443.

Sequence in context: A057371 A045286 A334825 * A057442 A141817 A008435

Adjacent sequences:  A057369 A057370 A057371 * A057373 A057374 A057375

KEYWORD

nonn

AUTHOR

Naohiro Nomoto, Sep 24 2000

EXTENSIONS

New name and more terms from Jinyuan Wang, May 02 2021

STATUS

approved

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Last modified November 27 04:53 EST 2021. Contains 349346 sequences. (Running on oeis4.)