# A138544 (b-file synthesized from sequence entry)
0 1
1 -1
2 4
3 -9
4 42
5 -130
6 660
7 -2415
8 12810
9 -51786
10 281736
11 -1216446
12 6727644
13 -30440124
14 170316432
15 -798126615
16 4504487130
17 -21692469370
18 123255492360
19 -606672653730
20 3465702008340
21 -17366224451940
22 99645553785960
23 -506814533253210
24 2918768920720380
25 -15034038412333500