A069572 - cp's OEIS frontend

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.

n	a(n)
1	1
2	21
3	321
4	2321
5	52321
6	252321
7	7252321
8	27252321
9	327252321
10	2327252321
11	12327252321
12	212327252321
13	1212327252321
14	21212327252321
15	321212327252321
16	2321212327252321
17	12321212327252321
18	212321212327252321

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

cp's OEIS Frontend

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.

Table of values

List of values