I was born in 1960 in the village Veřovice (Czech Republic, EU). I graduated from higher education institution of building construction – FAST VUT in Brno (Czech Republic, EU). I work as tradesman, technician and businessman in the field of building installations. I live and work in the city Orlová (Czech Republic, EU), I'm married and have 2 sons. Mathematics and number theory are my hobby. I currently working on putting the website www.sequences.cz dedicated to properties and transformations of integer sequences. Contact: firstname.lastname@example.org.