![]()  | 
Journal of Integer Sequences, Vol. 17 (2014), Article 14.1.2 | 
Xiangxing Kong
Department of Mathematics and Statistics 
Central South University 
Changsha 410075 
China 
Mehmet Acikgoz
Department of Mathematics
University of Gaziantep 
27310 Gaziantep 
Turkey 
Erdoğan Şen
Department of Mathematics
Namik Kemal University
59030 Tekirdag
Turkey
Abstract:
Received January 23 2013; revised versions received June 5 2013; December 7 2013. Published in Journal of Integer Sequences, December 8 2013.