Tower of Euler

Tower of Euler

This is a part of a series of towers/penholders made out of digits.
Tower of Pi: http://www.thingiverse.com/thing:271769
Tower of Tau: http://www.thingiverse.com/thing:295304
Tower of Euler: http://www.thingiverse.com/thing:783098
Tower of Phi: http://www.thingiverse.com/thing:788653
Pi - Penholder: http://www.thingiverse.com/thing:271353