# A191423 (b-file synthesized from sequence entry)
0 1
1 0
2 2
3 3
4 20
5 -30
6 594
7 -840
8 14384
9 -167832
10 2300040
11 -17190360
12 153272712
13 -2775904560
14 51294972624
15 -651268374120
16 7597950113280
17 -151775259773760
18 3587640413505984
19 -63586583168595840
20 972086975299451520