# A012358 (b-file synthesized from sequence entry)
0 0
1 0
2 2
3 -3
4 16
5 -50
6 560
7 -4116
8 49376
9 -495648
10 6885568
11 -93060880
12 1541938880
13 -25786609056
14 491456933760
15 -9706007213280
16 211232587063296
17 -4810337505293312
18 118025076480927744
19 -3034967141004516864
20 82967370464849969152
21 -2375277511119683573760