The door of Stevenson screen faces the north direction.
12, 220, 322, 376, 402, 415
11 110 978 6824 34103 102290
132, 148, 196, 340, 762, 2068
31, 35, 62, 87, 430, 1761
2 27 43 50 56 57
...1 3 7 15 33
...24, (24 + 2p), (24 + 4p), (24 + 6p), (24 + 8p), (24 + 10p)
6, -3, 11, 21, 125, 715
1, 2, 8, 48, 386, 3840
28, 84, 42, 126, 68, 189
