# A094384 (b-file synthesized from sequence entry)
1 1
2 -2
3 4
4 16
5 -32
6 -128
7 -512
8 4096
9 -8192
10 -32768
11 -131072
12 1048576
13 4194304
14 -33554432
15 268435456
16 4294967296
17 -8589934592
18 -34359738368
19 -137438953472
20 1099511627776
21 4398046511104
22 -35184372088832
23 281474976710656