顿 Ӣ۾һ
40=1000000
41=2000000
42=4000000
43=6000000
44=8000000
45=12000000
46=24000000
47=30000000
48=60000000
49=105000000
50=165000000
51=255000000
52=460000000
53=720000000
54=900000000
55=1000000000
56=1200000000
57=1400000000
58=1600000000
59=1800000000
60=2000000000
61=2400000000
62=2800000000
63=3200000000
64=3600000000
65=4000000000
66=4000000000
67=4000000000
68=4000000000
69=4000000000
70=4000000000
71=4000000000
72=4000000000
73=4000000000
74=4000000000
75=4000000000
76=4000000000
77=4000000000
78=4000000000
79=4000000000
80=4000000000
