OFFSET
1,1
LINKS
Chai Wah Wu, Table of n, a(n) for n = 1..103
EXAMPLE
Anti-divisors of 15 are 2, 6, 10 and their concatenation in ascending order is 2610. Finally, 2610 / 15 = 174.
MAPLE
P:=proc(q) local a, k, n; for n from 3 to q do a:=0;
for k from 2 to n-1 do if abs((n mod k)-k/2)<1 then a:=a*10^(ilog10(k)+1)+k; fi; od;
if type(a/n, integer) then print(n); fi; od; end: P(10^9);
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Paolo P. Lava, Nov 05 2014
STATUS
approved