# A009418 (b-file synthesized from sequence entry)
0 0
1 1
2 1
3 2
4 4
5 19
6 11
7 321
8 -720
9 12489
10 -84849
11 1008765
12 -10502700
13 131502669
14 -1702662077
15 24172986033
16 -364322094976
17 5871664124881
18 -100335623138817
19 1815293290581909
20 -34642054850289196
21 695636985512560149