|Journal of Integer Sequences, Vol. 23 (2020), Article 20.5.6|
We also derive a recursive formula for the number of unordered factorizations with k different parts and a simple recursive formula for the number of partitions with k different parts.
(Concerned with sequences A008731 A045778 A050322 A050323 A116608 A122179 A122180.)
Received July 18 2019; revised versions received August 25 2019; August 28 2019; April 4 2020. Published in Journal of Integer Sequences, June 5 2020.