Similar to 十二面体

6th SS Mountain Division Nord

8th SS Cavalry Division Florian Geyer

12th SS Panzer Division Hitlerjugend

13th Parachute Dragoon Regiment

21st Waffen Mountain Division of the SS Skanderbeg

Dirlewanger Brigade

3rd SS Panzer Division Totenkopf

1. FC Magdeburg

101st Airborne Division

13 (number)

19 (number)

40 (number)

50 (number)

70 (number)

Mathematics

0.999...

Zero-dimensional space

Zero to the power of zero

One-dimensional space

1 + 2 + 3 + 4 + ⋯

1 + 2 + 4 + 8 + ⋯

Root of unity

Ones' complement

1 − 1 + 2 − 6 + 24 − 120 + ⋯

1 − 2 + 3 − 4 + ⋯