1,2

Table of n, a(n) for n=1..58.

n=9 -> 1001{2}=100{3}=21{4}=14{5}=13{6}=12{7}=11{8}=10{9}=9{10} -> 10011002114131211109 which is divisible by 21 (from 9 in base 4).

Cf. A054219.

Sequence in context: A256389 A225729 A035033 * A196277 A280196 A143896

Adjacent sequences: A054217 A054218 A054219 * A054221 A054222 A054223

nonn,base

Patrick De Geest, Feb 15 2000

approved