# A009406 (b-file synthesized from sequence entry)
0 0
1 1
2 -1
3 -1
4 0
5 29
6 -105
7 307
8 -2744
9 27417
10 -236025
11 2249895
12 -25156296
13 306281013
14 -3983598801
15 55800877467
16 -839348702160
17 13462454942385
18 -229273833323025
19 4133677629311823
20 -78661216493101680
21 1575432052386178509