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a(n) is the smallest fourth power m^4 such that the sum of the digits of m^4 is equal to n^4.

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`%I #17 Oct 14 2019 21:12:49
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`%S 0,1,14641,4228599998736,2598836588984899974898904499869498896
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`%N a(n) is the smallest fourth power m^4 such that the sum of the digits of m^4 is equal to n^4.
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`%F a(n) = A286650(n)^4.
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`%Y Cf. A067072, A067074, A286650.
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`%K nonn,base
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`%O 0,3
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`%A _Seiichi Manyama_, Aug 18 2017
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