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A265625 Differences between two positive cubes in more than two ways. 3
3367, 26936, 90909, 152551, 205352, 215488, 420875, 622232, 625177, 727272, 754299, 757701, 845208, 1147627, 1154881, 1220408, 1642816, 1723904, 2113921, 2454543, 2741256, 3056473, 3367000, 3442887, 3492125, 4118877, 4481477, 4977856, 5001416, 5544504 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..30.

EXAMPLE

3367 = 15^3 - 2^3 = 16^3 - 9^3 = 34^3 - 33^3.

MATHEMATICA

r = 5544504; p = 3; Rest@Sort@Drop[Flatten@Select[Tally@Reap[Do[n = i^p - j^p; If[n <= r, Sow[n]], {i, Ceiling[(r/p)^(1/(p - 1))]}, {j, i}]][[2, 1]], #[[2]] > 2 &], {2, -1, 2}]

CROSSREFS

Cf. A000578, A181123, A014439 (exactly one way), A034179 (more than one way), A014440 (exactly two ways), A014441 (exactly three ways).

Sequence in context: A163044 A069367 A031556 * A014441 A293651 A212948

Adjacent sequences:  A265622 A265623 A265624 * A265626 A265627 A265628

KEYWORD

nonn

AUTHOR

Arkadiusz Wesolowski, Dec 10 2015

STATUS

approved

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Last modified November 21 06:00 EST 2019. Contains 329350 sequences. (Running on oeis4.)