# A002633 (b-file synthesized from sequence entry)
0 1
1 -3
2 5
3 -3
4 9
5 -3
6 -51
7 -675
8 -5871
9 -46467
10 -331371
11 -1852227
12 -920295
13 224455293
14 5571057501
15 104877816093
16 1781775072801
17 28519837563645
18 431525731169061
19 5994769814117757
20 68879336771960361
21 346333945918252797
22 -15047168730918615315
23 -793523760950138583843