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34, 84, 34, 84, 34, 194, 34, 84, 34, 84, 34, 228, 34, 84, 34, 84, 34, 194, 34, 84, 34, 84, 34, 228, 34, 84, 34, 84, 34, 194, 34, 84, 34, 84, 34, 386, 34, 84, 34, 84, 34, 194, 34, 84, 34, 84, 34, 228, 34, 84, 34, 84, 34, 194, 34, 84, 34, 84, 34, 228, 34, 84, 34, 84, 34, 194
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refs;
listen;
history;
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OFFSET
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1,1
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COMMENTS
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a(n) <= 2p, where p = A002586(4n) is the least prime factor of (1 + 16^n). (See the Comment in A066135.) - Jonathan Sondow, Nov 23 2012
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LINKS
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Table of n, a(n) for n=1..66.
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FORMULA
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a(n) = Min{x : Mod[DivisorSigma[4n, x], x]=0, x>1}.
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EXAMPLE
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First 3 terms correspond to entries of other sequences as follows: a(1)=A046763(2),a(2)=A055712(2), a(3)=A055716(2).
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CROSSREFS
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Cf. A066135, A046761-A046763, A055709-A055717, A007691, A001159.
Sequence in context: A066944 A044172 A044553 * A036199 A092223 A046764
Adjacent sequences: A066281 A066282 A066283 * A066285 A066286 A066287
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KEYWORD
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nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Dec 11 2001
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STATUS
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approved
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