# A193341 (b-file synthesized from sequence entry)
1 1
2 2
3 6
4 16
5 0
6 -144
7 5488
8 47104
9 -2799360
10 -29427200
11 3293554176
12 40830142464
13 -7642645477376
14 -109489995819008
15 31826754503424000
16 518027268557111296
17 -221570477108873330688
18 -4041287223180417957888
19 2438941389381370203996160
20 49292069262802363796684800