The quincunx is the pattern of five dots 
that appears on the "5" side of a 6-sided die.
The word derives from the Latin words for both one and five.
The Galton board is sometimes also known as the quincunx.
Quincunx
See also
Boxcars, Dice, Galton Board, Snake EyesExplore with Wolfram|Alpha
References
Conway, J. H. and Guy, R. K. The Book of Numbers. New York:Springer-Verlag, pp. 9 and 22, 1996.Referenced on Wolfram|Alpha
QuincunxCite this as:
Weisstein, Eric W. "Quincunx." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Quincunx.html