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A101806
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Numbers which are the sum of two positive cubes and divisible by 23.
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7
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3059, 3197, 3473, 3887, 4439, 5129, 5957, 6923, 8027, 9269, 10649, 24334, 24472, 24886, 25576, 26542, 27784, 29302, 31096, 33166, 35512, 38134, 41032, 44206, 47656, 51382, 55384, 59662, 64216, 69046, 74152, 79534, 82179, 82593, 83421
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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upto[n_] := Block[{t}, Union@ Reap[ Do[If[Mod[t = x^3 + y^3, 23] == 0, Sow@t], {x, n^(1/3)}, {y, Min[x, (n - x^3)^(1/3)]}]][[2, 1]]]; upto[84000] (* Giovanni Resta, Jun 12 2020 *)
Select[Total/@Tuples[Range[50]^3, 2], Divisible[#, 23]&]//Union (* Harvey P. Dale, Jul 24 2022 *)
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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Jun Mizuki (suzuki32(AT)sanken.osaka-u.ac.jp), Jan 27 2005
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STATUS
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approved
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