Journal of Integer Sequences, Vol. 23 (2020), Article 20.2.6 |
Abstract:
(Concerned with sequences A000367 A002445 A008277 A027641 A027642.)
Received November 6 2019; revised versions received November 7 2019; January 19 2020; January 20 2020; January 23 2020; January 27 2020; February 10 2020; February 20 2020. Published in Journal of Integer Sequences, February 20 2020.