Article date: Jul 1974
Article title: On the patterns and the unusual properties of figurate numbers
Mathematical Games column? Y
Book: 12. Time Travel and Other Mathematical Bewilderments
Chapter: 2. Hexes and Stars
This data confirmed? yes
Notes
Peter Rowlett (27 August 2022):
Peter Rowlett initial guess (Uncertain)
Peter Rowlett (2 November 2023):
I have seen this chapter and column side-by-side and they match.