a(n) is the least positive integer k such that k is a repdigit number in exactly n different bases B, where 1<B<k.

A066460

a(n) is the least positive integer k such that k is a repdigit number in exactly n different bases B, where 1<B<k.

Terms

    a(0) =1a(1) =3a(2) =7a(3) =15a(4) =24a(5) =40a(6) =60a(7) =144a(8) =120a(9) =180a(10) =336a(11) =420a(12) =360a(13) =900a(14) =960a(15) =720a(16) =840a(17) =1260a(18) =1440a(19) =2340a(20) =1680a(21) =2880a(22) =3600a(23) =8190a(24) =2520a(25) =9072a(26) =9900a(27) =6300a(28) =6720a(29) =20592

External references