# A013248 (b-file synthesized from sequence entry)
0 0
1 0
2 -1
3 4
4 -6
5 0
6 -150
7 2280
8 -16520
9 96320
10 -1045800
11 17316000
12 -244530000
13 3061344000
14 -43372529200
15 761044648000
16 -14257920144000
17 263995016064000
18 -5068873669392000
19 106427464573248000