Every hour is an hour, and every remaining cell becomes the original two, and one dies.

1 hour later =2*2- 1=3

After 2 hours =3*2- 1=6- 1=5

After 3 hours = 5 * 2-1=10-1= 9.

After 4 hours = 9 * 2-1=18-1=17.

After 5 hours =17 * 2-1= 34-1= 33.

The legal provisions are as follows

Integer of line number

1 1

2 2

3 4

4 8

...

It can be found that for each additional line, the integer is multiplied by 2.

So the number of integers in the nth row = 1 * 2 * 2 * (there are n- 1 intervals from1to n * *, so there are n- 1 two) ... * 2.

=2^(n- 1)