# A001896 (b-file synthesized from sequence entry)
0 1
1 -1
2 7
3 -31
4 127
5 -2555
6 1414477
7 -57337
8 118518239
9 -5749691557
10 91546277357
11 -1792042792463
12 1982765468311237
13 -286994504449393
14 3187598676787461083
15 -4625594554880206790555
16 16555640865486520478399
17 -22142170099387402072897