%I #12 Dec 08 2018 03:20:22
%S 1,21,321,2321,52321,252321,7252321,27252321,327252321,2327252321,
%T 12327252321,212327252321,1212327252321,21212327252321,
%U 321212327252321,2321212327252321,12321212327252321,212321212327252321
%N Smallest n-digit number in which the k-th digit (from the right!) is a divisor of k, greater than 1 unless k has no single-digit divisor > 1.
%Y Cf. A069570, A069571.
%K nonn,base
%O 1,2
%A _Amarnath Murthy_, Mar 24 2002
%E a(12) corrected by _Martin Ward_, Feb 12 2013