A069572 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.

1, 21, 321, 2321, 52321, 252321, 7252321, 27252321, 327252321, 2327252321, 12327252321, 212327252321, 1212327252321, 21212327252321, 321212327252321, 2321212327252321, 12321212327252321, 212321212327252321

Offset

1,2

Links

Table of n, a(n) for n=1..18.

Crossrefs

Cf. A069570, A069571.

Sequence in context: A055434 A016315 A113531 * A260487 A057138 A104759

Adjacent sequences: A069569 A069570 A069571 * A069573 A069574 A069575

Keyword

nonn,base

Author

Amarnath Murthy, Mar 24 2002

Extensions

a(12) corrected by Martin Ward, Feb 12 2013

Status

approved