# A051198 (b-file synthesized from sequence entry)
0 0
1 7
2 36
3 165
4 715
5 3000
6 12376
7 50388
8 203490
9 817190
10 3268750
11 13037895
12 51895935
13 206253075
14 818809200
15 3247943125
16 12875774670
17 51021117810
18 202112640600
19 800472431850
20 3169870830000
21 12551759587422
22 49699896548176