# A013196 (b-file synthesized from sequence entry)
0 0
1 1
2 0
3 -3
4 16
5 -27
6 -48
7 777
8 -5504
9 48905
10 -149120
11 -4320107
12 76593152
13 -424303635
14 -2866784256
15 77237001761
16 -1179358298112
17 20512289602833
18 -131744654655488
19 -6321209675239123
20 194063863443816448