# A165314 (b-file synthesized from sequence entry)
0 1
1 6
2 42
3 330
4 2778
5 24234
6 215034
7 1923018
8 17258010
9 155125482
10 1395342906
11 12554940426
12 112981880922
13 1016786596650
14 9150878043258
15 82357097082954
16 741210652521114
17 6670882987788138
18 60037895350485690
19 540340851995941002