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A362636
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a(n) = Sum_{d|n, gcd(d,n/d)=1} d^d.
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0
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1, 5, 28, 257, 3126, 46688, 823544, 16777217, 387420490, 10000003130, 285311670612, 8916100448540, 302875106592254, 11112006826381564, 437893890380862528, 18446744073709551617, 827240261886336764178, 39346408075296924995918, 1978419655660313589123980, 104857600000000000000003382
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OFFSET
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1,2
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LINKS
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FORMULA
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a(p) = p^p + 1, for primes p.
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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