From SpaceOdyssey:

http://www.ac-nice.fr/cav/kubrick/2001-monolith.jpg

The mysterious alien monolith from "2001, A Space Odyssey".
The actual physical dimensions were ''(according to the book)'' in the ratio 1 x 4 x 9, the squares of the first three integers. The book mentions that the sequence does not stop at three dimensions.

''MyGodItsFullOfStars!''

Not to be confused with a ClueByFour.