
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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OFFSET

1,1


COMMENTS

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


LINKS

Table of n, a(n) for n=1..66.


FORMULA

a(n) = Min{x : Mod[DivisorSigma[4n, x], x]=0, x>1}.


EXAMPLE

First 3 terms correspond to entries of other sequences as follows: a(1)=A046763(2),a(2)=A055712(2), a(3)=A055716(2).


CROSSREFS

Cf. A066135, A046761A046763, A055709A055717, A007691, A001159.
Sequence in context: A066944 A044172 A044553 * A036199 A092223 A046764
Adjacent sequences: A066281 A066282 A066283 * A066285 A066286 A066287


KEYWORD

nonn


AUTHOR

Labos Elemer, Dec 11 2001


STATUS

approved

