Packing in the commuter train

We had calculated the number of all compactly contacting sites of 193 times. Mostly contacting sites are 5 in 173 times, which are chest, back, one of shoulder and two sites of the other shoulder. We made rubber miniature models same form as my body of the overhead view showing, to reproduce the condition in the crowded commuter train. The first step may be one person surrounding by 5 persons, and the second step may show each 5 person is surrounded by 5 persons, and so on. If all contacting sites are five, this total number is shown in the Formula: 1+5x and whole appearance is shown as diamond shape. However, the inner shape of commuter train is not diamond-shape. Then, we tried to make the miniatures of the commuter train with the same pattern of actual distribution of chairs and also the other pattern of gathered chairs densely at the one corner of the train, and packed with miniatures of my upper appeared figure.