# A012159 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 2
4 5
5 16
6 61
7 216
8 937
9 6400
10 41881
11 125696
12 259181
13 18156672
14 225924245
15 -930421504
16 -25529526319
17 394852151296
18 8376428366257
19 -97538559528960
20 -2542034772205739
21 37824762737852416