# A143168 (b-file synthesized from sequence entry)
0 1
1 18
2 345
3 7650
4 196245
5 5755050
6 190482705
7 7034400450
8 286988226525
9 12826061498250
10 623403611055225
11 32747785180560450
12 1849179329801929125
13 111713055889014830250
14 7190273917194645902625
15 491244630824362410245250
16 35508203161436371983742125