Number of visits to origin

Sequence of steps

0

(1F®{3}®1B)

1

(1F-1B-1F®{2}®1B)(1F®1®1B-1F®{1}®1B)

(1F®{2}®1B-1F-1B)

2

(1F-1B-1F-1B-1F®{1}®1B)(1F-1B-1F®{1}®1B-1F-1B)

(1F®{1}®1B-1F-1B-1F-1B)

3

(1F-1B-1F-1B-1F-1B-1F-1B)