Journal of Integer Sequences, Vol. 22 (2019), Article 19.8.1 |
Nicola Oswald
Faculty for Mathematics and Natural Sciences
Wuppertal University
Gauß-Str. 20, Wuppertal 42119
Germany
Jörn Steuding
Department of Mathematics
Würzburg University
Am Hubland, Würzburg 97218
Germany
Abstract:
Received January 16 2019; revised versions received May 2 2019; May 6 2019; August 8 2019; August 26 2019. Published in Journal of Integer Sequences, December 6 2019.