# A165546 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 22
5 90
6 395
7 1823
8 8741
9 43193
10 218704
11 1129944
12 5937728
13 31656472
14 170892498
15 932625326
16 5138618526
17 28554124650
18 159874462032
19 901243508380
20 5111776163584
21 29155580007964
22 167139065156182
23 962618219420046