# A009821 (b-file synthesized from sequence entry)
0 0
1 1
2 2
3 -1
4 -12
5 37
6 358
7 -1517
8 -19352
9 108393
10 1709194
11 -11820345
12 -222722596
13 1828543693
14 40122780142
15 -380880450277
16 -9543330683696
17 102776857839441
18 2895895566420498
19 -34874008165786609
20 -1091590070839432764