# A020927 (b-file synthesized from sequence entry)
0 1
1 -30
2 390
3 -2860
4 12870
5 -36036
6 60060
7 -51480
8 12870
9 2860
10 1716
11 1560
12 1820
13 2520
14 3960
15 6864
16 12870
17 25740
18 54340
19 120120
20 276276
21 657800
22 1614600
23 4071600
24 10518300
25 27768312
26 74760840
27 204900080
28 570793080
29 1613966640
30 4626704368
31 13432367520