# A013351 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 -3
4 0
5 -15
6 90
7 -273
8 2520
9 -15495
10 126630
11 -977493
12 9727740
13 -88854675
14 979548570
15 -10671316113
16 129584342160
17 -1617243395055
18 21655877754510
19 -303182522321133
20 4450716903531780
21 -68820502388338635