

A121154


a(n) = the nth divisor of r(n)^n, where r(n) = (10^n1)/9 the repunits and the positive divisors of r(n)^n are written in order from smallest to largest.


0



1, 11, 9, 121, 11111, 13, 21613201, 1111, 333, 4961, 219660193449998401
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OFFSET

1,2


COMMENTS

Sequence continues: n=12: unknown, n=13: 17530969, n=14: 562529, n=15: unknown, n=16: unknown, n=17: 79066065031254967758669825213076144489,


LINKS

Table of n, a(n) for n=1..11.


EXAMPLE

1, 11, 101, 121, 1111, 1331, 10201, 12221, 14641, 112211, 134431,... is the
beginning of the sequence of divisors of 1111^4 and 121 is the 4th term of
this sequence, so a(4) = 121.


CROSSREFS

Cf. A121067.
Sequence in context: A219746 A220664 A038323 * A256078 A078200 A105034
Adjacent sequences: A121151 A121152 A121153 * A121155 A121156 A121157


KEYWORD

more,nonn


AUTHOR

Jason Earls, Aug 13 2006


STATUS

approved



