# A117251 (b-file synthesized from sequence entry)
0 1
1 1
2 -1
3 4
4 -40
5 896
6 -43008
7 4325376
8 -899678208
9 383862702080
10 -334114095890432
11 590956713604022272
12 -2117988861556815822848
13 15348576513041885002989568
14 -224527747847927003472304537600
15 6621592717332784844802427579269120