# A149211 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 10
4 40
5 138
6 565
7 2176
8 9188
9 37402
10 161792
11 683613
12 3011220
13 13056815
14 58330575
15 257707423
16 1164365165
17 5218512437
18 23796555039
19 107869829968
20 495677234473
21 2267636212604
22 10487894398833
23 48345625875368
24 224845633034712
25 1043089987843812
26 4874603254258163
27 22737124220058175