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3 cubed
3 cubed is 27, so the cube root of 27 is 3..
A centered hexagonal number, or hex number, is a centered figurate number that represents a hexagon with a dot in the center and all other dots surrounding the center dot in a hexagonal lattice...
http://www.youtube.com/watch?v=AyenRCJ_4Ww
Arithmetic mean of first 37 triangular numbers is 247 ...
http://www.smphillips.8m.com/hexagon.html
http://www.mathsisfun.com/numbers/cuberoot.html
http://en.wikipedia.org/wiki/Centered_hexagonal_number
