# A165910 (b-file synthesized from sequence entry)
1 1
2 4
3 18
4 62
5 210
6 666
7 2063
8 6226
9 18484
10 54100
11 156620
12 449268
13 1278981
14 3617544
15 10175590
16 28485218
17 79406350
18 220536910
19 610487875
20 1684974790
21 4638298536
22 12737460744
23 34902844728
24 95449821672
25 260554112425
26 710056257196