In all articles found the formula for the square pyramidal number is proofed by using the inductive methode. Isn't there a direct proof? Jon van den Helder
- I thought inductive was direct. An empirical proof (e.g., having a computer calculate the first thousand values using each formula and then having it compare that the lists are all the same) would convince more people, but symbological snobs would look down on it. Anton Mravcek 17:49, 14 July 2006 (UTC)
This article could use some diagrams to illustrate how the numbers are "built" as pyramids. — Gwalla | Talk 22:28, 10 February 2007 (UTC)
- I tried making one at Image:Square pyramidal number.svg but my radial gradiants are not looking correct. I'll try to find out what's wrong with the svg coding, but it shouldn't be linked onto the actual article until it looks better. —David Eppstein 23:04, 10 February 2007 (UTC)
