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Pyramid Mysteries

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  1. E. Behrends, St. Humble. Triangle Mysteries, The Mathematical Intelligencer, 35, no.2 (2013), pp. 10–15.

  2. (or google “triangle mysteries new york times”).

  3. H. Joris, C. Oestreicher, and J. Steinig. The greatest common divisor of certain sets of binomial coefficients, J. Number Theory, 21 (1985), pp. 101−119.

  4. Balak Ram. Common Factors of \(\frac{n!}{m!(n-m)!}, m=1,\ldots,n-1\), Journal of the Indian Mathematical Club, 1 (1909), pp. 39–43.

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Correspondence to Ehrhard Behrends.

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Behrends, E. Pyramid Mysteries. Math Intelligencer 36, 14–19 (2014).

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  • Pyramid
  • Mathematical Intelligencer
  • Ground Layer
  • Preceding Proposition
  • Corner Cube