# A009655 (b-file synthesized from sequence entry)
0 0
1 0
2 2
3 -6
4 22
5 -100
6 788
7 -8568
8 103416
9 -1307808
10 17722512
11 -264361680
12 4373968080
13 -79413478560
14 1558387903200
15 -32713320769920
16 731007454396800
17 -17347090012492800
18 436154519763744000
19 -11585396062022112000