# A013190 (b-file synthesized from sequence entry)
0 0
1 1
2 0
3 -2
4 8
5 -12
6 -48
7 432
8 -2112
9 10000
10 14080
11 -1500512
12 17517568
13 -18269760
14 -1666201600
15 16350361856
16 -45064462336
17 922523568384
18 -4131436888064
19 -990634832194048
20 21402743134224384
21 92553699220882432