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A343077
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a(n) is the smallest number that is the sum of n positive 4th powers in two ways.
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6
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635318657, 2673, 259, 260, 261, 262, 263, 264, 265, 266, 267, 268, 269, 270, 256, 257, 258, 259, 260, 261, 262, 263, 264, 265, 266, 267, 268, 269, 270, 271, 272, 273, 274, 275, 276, 277, 278, 279, 280, 281, 282, 283, 284, 285, 286, 287, 288, 289, 290, 291, 292
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OFFSET
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2,1
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COMMENTS
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This is r(n,4,2) in Alter's notation.
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LINKS
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FORMULA
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a(n) = n + 240 for n >= 16.
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EXAMPLE
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a(2) = 635318657 = 59^4 + 158^4 = 133^4 + 134^4.
a(3) = 2673 = 2^4 + 4^4 + 7^4 = 3^4 + 6^4 + 6^4.
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CROSSREFS
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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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