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A025323
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Numbers that are the sum of 3 nonzero squares in exactly 3 ways.
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19
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54, 66, 81, 86, 89, 99, 101, 110, 114, 126, 131, 149, 150, 162, 166, 173, 174, 179, 182, 185, 186, 216, 219, 221, 222, 225, 227, 233, 237, 241, 242, 245, 258, 264, 274, 275, 286, 291, 302, 305, 309, 315, 318, 323, 324, 334, 338, 344, 347, 349, 356, 361, 366, 377, 396
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OFFSET
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1,1
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LINKS
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FORMULA
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EXAMPLE
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182 is a term because 182 = 1^2 + 9^2 + 10^2 = 2^2 + 3^2 + 13^2 = 5^2 + 6^2 + 11^2 and there are no more such sums of three nonzero squares giving 182. - David A. Corneth, Feb 13 2019
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MATHEMATICA
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Select[Range@ 400, Length@ # == 3 &@ DeleteCases[PowersRepresentations[#, 3, 2], _?(AnyTrue[#, # == 0 &] &)] &] (* Michael De Vlieger, Feb 13 2019 *)
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PROG
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CROSSREFS
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Cf. A024796, A025427, A025322, A025323, A025324, A025325, A025326, A025327, A025328, A025329, A025330, A025331, A025332, A025333, A025334, A025335, A025336, A025337, A025338.
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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