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A047698
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Numbers that are the sum of four positive seventh powers in two or more ways.
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0
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2056364173794800, 12191487610289536, 263214614245734400, 696885239160606459, 1560510414117060608, 4497268448089227600, 18896044524917750533, 25704745581139341318, 26662783403703215232, 33691470623454003200, 44053472466326057527, 100502405478837434259
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OFFSET
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1,1
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LINKS
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EXAMPLE
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4497268448089227600 = 30^7 + 42^7 + 369^7 + 447^7 = 45^7 + 270^7 + 387^7 + 438^7. - Sean A. Irvine, May 15 2021
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CROSSREFS
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KEYWORD
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nonn,hard
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AUTHOR
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EXTENSIONS
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Corrected by D. J. Bernstein (djb(AT)cr.yp.to)
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STATUS
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approved
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