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 A121154 a(n) = the n-th divisor of r(n)^n, where r(n) = (10^n-1)/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 (list; graph; refs; listen; history; text; internal format)
 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 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

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Last modified October 23 20:19 EDT 2018. Contains 316530 sequences. (Running on oeis4.)