# A109317 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 22
5 94
6 446
7 2294
8 12542
9 71974
10 429342
11 2643606
12 16710382
13 107980870
14 710933118
15 4756345750
16 32265548622
17 221540438502
18 1537355395934
19 10768777480374
20 76063545106670
21 541277072787334
22 3877624448977150