70

70 (seventy) is a positive integer following 69 and preceding 71.

Visualization

 * 1
 * 1 1   1
 * 1  2    1
 * 1 3     3 1
 * 1 4  6    4 1
 * 1 5 10   10 5 1
 * 1 6 15 20  15 6 1
 * 1 7 21 35 35 21 7 1
 * 1 8 28 56 70 56 28 8 1
 * etc.     etc.      etc.