# A009799 (b-file synthesized from sequence entry)
0 0
1 1
2 2
3 0
4 -24
5 -148
6 -248
7 5488
8 73024
9 346768
10 -3749728
11 -100273536
12 -922745472
13 4147334336
14 283697686144
15 4362058183936
16 4465927211008
17 -1382047649378048
18 -33554250522144256
19 -226963355560685568
20 10084981854738991104