# A129841 (b-file synthesized from sequence entry)
1 1
2 -1
3 4
4 -12
5 52
6 -256
7 1502
8 -10158
9 78360
10 -680280
11 6574872
12 -70075416
13 816909816
14 -10342968456
15 141357740736
16 -2074340369088
17 32530886655168
18 -542971977209760
19 9610316495698416
20 -179788450082431536
21 3544714566466060032