# A002915 (b-file synthesized from sequence entry)
1 0
2 0
3 4
4 0
5 0
6 -8
7 60
8 -144
9 416
10 -1248
11 4200
12 -13248
13 42936
14 -138072
15 452840
16 -1480944
17 4883688
18 -16114784
19 53457696
20 -177637248