# A084206 (b-file synthesized from sequence entry)
0 1
1 1
2 -2
3 7
4 -27
5 115
6 -510
7 2343
8 -11029
9 52896
10 -257457
11 1268098
12 -6307546
13 31633044
14 -159757597
15 811708539
16 -4145882814
17 21273287952
18 -109603172373
19 566748274099
20 -2940175511195
21 15297961574259
22 -79808998488751
23 417373462315834