# A149304 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 11
4 48
5 153
6 695
7 2461
8 11430
9 42933
10 202241
11 790669
12 3760536
13 15125411
14 72443050
15 297652719
16 1433159704
17 5986967421
18 28945946323
19 122535705935
20 594410042334
21 2543786121717
22 12373361059432
23 53434246508299
24 260504421338140
25 1133661768994795
26 5537534006629171
27 24257661377551561