# A289683 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 18
4 171
5 2250
6 37935
7 780570
8 18967095
9 531545490
10 16877619675
11 598825908450
12 23479803807075
13 1008211866111450
14 47052981361160775
15 2371481399995958250
16 128370589834339227375
17 7427764736129937449250
18 457497972176819368669875