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1, 5, 28, 261, 3126, 46688, 823544, 16777477, 387420517, 10000003386, 285311670612, 8916117272416, 302875106592254, 11112006826381820, 437893890380862528, 18446744073726329093, 827240261886336764178, 39346408075296925042857
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OFFSET
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1,2
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COMMENTS
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This sequence is different from A062796.
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LINKS
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FORMULA
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a(n) = Sum_{k=1..n, k^k | n^n} k^k.
If p is prime, a(p) = 1 + p^p.
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PROG
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(PARI) a(n) = sum(k=1, n, (n^n%k^k==0)*k^k);
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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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