@article {MR2854212,
	title = {The sum of digits of <em>n</em> and <em>n<sup>2</sup></em>},
	journal = {Int. J. Number Theory},
	volume = {7},
	year = {2011},
	pages = {1737{\textendash}1752},
	issn = {1793-0421},
	doi = {10.1142/S1793042111004319},
	url = {http://dx.doi.org/10.1142/S1793042111004319},
	author = {Hare, Kevin G. and Laishram, Shanta and Stoll, Thomas}
}
