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Search: id:A122004
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| A122004 |
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Primes p that divide A123373[p-1] = Sum[ Sum[ Prime[i]^Prime[j], {i,1,p-1}], {j,1,p-1}]. |
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1
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OFFSET
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1,1
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COMMENT
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A123373[n] = Sum[ Sum[ Prime[i]^Prime[j], {i,1,n}], {j,1,n}].
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EXAMPLE
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A123373[n] begins {4, 48, 3598, 924780, 287358579128, ...}.
a(1) = 2 because 2 divides A123373[1] = 4.
a(2) = 3 because 3 divides A123373[2] = 48.
a(3) = 5 because 5 divides A123373[4] = 924780.
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CROSSREFS
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Cf. A123373, A086787 - Sum(Sum(i^j, j=1..n), i=1..n).
Sequence in context: A024767 A041195 A042141 this_sequence A023231 A034470 A138170
Adjacent sequences: A122001 A122002 A122003 this_sequence A122005 A122006 A122007
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KEYWORD
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hard,more,nonn
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AUTHOR
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Alexander Adamchuk (alex(AT)kolmogorov.com), Oct 14 2006
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