1,2

Table of n, a(n) for n=1..68.

321 is in the sequence because (counting digits from the left) 3 is a multiple of 1, 2 is a multiple of 2, and 1 is a divisor of 3.

Cf. A069570.

Sequence in context: A124097 A180478 A062461 * A252996 A252495 A182175

Adjacent sequences: A178840 A178841 A178842 * A178844 A178845 A178846

base,easy,nonn

Jeremy Gardiner, Jun 17 2010

approved