# A009215 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 -3
4 -15
5 -3
6 297
7 1113
8 -6783
9 -77063
10 70609
11 5509845
12 18558705
13 -430006731
14 -4027228359
15 33282260529
16 727421677185
17 -1454472663311
18 -134584692783455
19 -448480622503635
20 26232888936219249
21 254015086363619949