# A013286 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 0
4 -3
5 40
6 -250
7 1008
8 -6307
9 77040
10 -742524
11 5642560
12 -56921887
13 809088696
14 -10450329838
15 122609052720
16 -1712600698983
17 28629942196960
18 -466274068556152
19 7411488125575680
20 -130844029905109723