OFFSET
1,1
COMMENTS
From Robert Israel, Dec 29 2020: (Start)
If n is a term, so are 10*n and (10^m+1)*n where 10^(m-1) > n.
All terms are divisible by 3. (End)
LINKS
Robert Israel, Table of n, a(n) for n = 1..10000
MAPLE
filter:= proc(n) local t, k;
t:= digsum(n);
for k from 2 to 9 do if digsum(k*n)=t then return true fi od;
false
end proc:
select(filter, [seq(i, i=3..1000, 3)]); # Robert Israel, Dec 29 2020
CROSSREFS
KEYWORD
nonn,easy,base
AUTHOR
Altug Alkan, Sep 04 2016
STATUS
approved