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Search: id:A017712
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| A017712 |
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Denominator of sum of -24 th powers of divisors of n. |
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+0
72
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| 1, 16777216, 282429536481, 281474976710656, 59604644775390625, 2369190669160808448, 191581231380566414401, 4722366482869645213696, 79766443076872509863361, 500000000000000000000000, 9849732675807611094711841
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OFFSET
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1,2
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COMMENT
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Sum_{d|n} 1/d^k is equal to sigma_k(n)/n^k. So sequences A017665-A017712 also give the numerators and denominators of sigma_k(n)/n^k for k = 1..24. The power sums sigma_k(n) are in sequences A000203 (k=1), A001157-A001160 (k=2,3,4,5), A013954-A013972 for k = 6,7,...,24. - comment from Ahmed Fares (ahmedfares(AT)my-deja.com), Apr 05 2001.
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CROSSREFS
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Cf. A017711.
Sequence in context: A017624 A016812 A016908 this_sequence A010812 A016968 A017040
Adjacent sequences: A017709 A017710 A017711 this_sequence A017713 A017714 A017715
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KEYWORD
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nonn,frac
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AUTHOR
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njas
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