# A135632 (b-file synthesized from sequence entry)
1 2
2 4
3 6
4 8
5 30
6 32
7 126
8 128
9 8190
10 8192
11 131070
12 131072
13 524286
14 524288
15 2147483646
16 2147483648
17 2305843009213693950
18 2305843009213693952
19 618970019642690137449562110
20 618970019642690137449562112