Y by Davi-8191, samrocksnature, megarnie, ImSh95, Rounak_iitr, Adventure10, Mango247, deplasmanyollari
For any positive integer
, denote the sum of digits of
in its decimal representation by
. Find all polynomials
with integer coefficients such that for any positive integer
, the integer
is positive and 
Proposed by Warut Suksompong, Thailand







Proposed by Warut Suksompong, Thailand
This post has been edited 1 time. Last edited by Amir Hossein, Jul 19, 2017, 5:11 PM
Reason: Added the proposer.
Reason: Added the proposer.