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A068477
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a(n) is the digital sum of 1^n + 2^n + ... + n^n.
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1
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0, 1, 5, 9, 12, 15, 22, 10, 33, 45, 43, 60, 44, 79, 70, 72, 65, 90, 111, 91, 125, 117, 132, 168, 133, 127, 171, 189, 172, 195, 218, 232, 217, 234, 221, 243, 240, 280, 290, 261, 315, 348, 352, 325, 345, 351, 346, 303, 338, 367, 373, 396, 404, 414, 495, 424, 428
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OFFSET
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0,3
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LINKS
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FORMULA
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MAPLE
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dig := X->convert((convert(X, base, 10)), `+`); a := n->dig(sum(m^n, m=1..n));
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MATHEMATICA
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Table[Sum[DigitCount[Sum[k^n, {k, 1, n}]][[i]]*i, {i, 9}], {n, 0, 100}] (* G. C. Greubel, Oct 13 2018 *)
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PROG
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(PARI) a(n) = sumdigits(sum(k=1, n, k^n)); \\ Michel Marcus, Oct 14 2018
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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Francois Jooste (phukraut(AT)hotmail.com), Mar 10 2002
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STATUS
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approved
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