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A375332
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a(n) is the smallest number which can be represented as the sum of 5 distinct positive n-th powers in exactly 4 ways, or -1 if no such number exists.
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5
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OFFSET
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1,2
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LINKS
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EXAMPLE
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a(4) = 54994 = 1^4 + 2^4 + 4^4 + 8^4 + 15^4
= 1^4 + 2^4 + 9^4 + 10^4 + 14^4
= 2^4 + 5^4 + 6^4 + 11^4 + 14^4
= 3^4 + 7^4 + 8^4 + 10^4 + 14^4.
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CROSSREFS
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Cf. A046881, A342899, A374418, A374421, A374422, A374423, A374424, A374425, A375329, A375330, A375331, A375333, A375334.
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KEYWORD
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sign,hard,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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