# A163147 (b-file synthesized from sequence entry)
0 1
1 12
2 124
3 1208
4 11456
5 107232
6 997184
7 9242368
8 85517056
9 790574592
10 7305293824
11 67488831488
12 623410712576
13 5758241390592
14 53185308114944
15 491231692423168
16 4537090136866816
17 41905067449516032
18 387038978271084544