# A036973 (b-file synthesized from sequence entry)
0 0
1 1
2 16
3 158
4 1232
5 8358
6 51744
7 300300
8 1661088
9 8853702
10 45819488
11 231499268
12 1146562144
13 5584082140
14 26808586560
15 127118807640
16 596271746880
17 2770379517510
18 12763270285920
19 58358565060180
20 265032926077920
21 1196278125942900