# A009777 (b-file synthesized from sequence entry)
0 0
1 1
2 -1
3 3
4 0
5 -25
6 165
7 -623
8 392
9 18909
10 -206685
11 1233551
12 -1161336
13 -81119597
14 1241356025
15 -10102782675
16 12681799920
17 1158387845177
18 -22791296600793
19 234950313889819
20 -368659923645520
21 -41597707520306049