# A053406 (b-file synthesized from sequence entry)
0 1
1 4
2 15
3 49
4 172
5 511
6 1600
7 4968
8 15328
9 40858
10 82484
11 106963
12 114376
13 116592
14 117100
15 117127
16 117128
17 117129