# A012768 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 2
4 5
5 20
6 85
7 16
8 -887
9 14096
10 145865
11 -887456
12 -14963507
13 126998976
14 2554796829
15 -21834514688
16 -556819358703
17 5067177011456
18 157094249035537
19 -1485621376751104
20 -55286734778859115