# A099486 (b-file synthesized from sequence entry)
0 0
1 1
2 4
3 14
4 52
5 195
6 728
7 2716
8 10136
9 37829
10 141180
11 526890
12 1966380
13 7338631
14 27388144
15 102213944
16 381467632
17 1423656585
18 5313158708
19 19828978246
20 74002754276
21 276182038859
22 1030725401160
23 3846719565780
24 14356152861960