# A150381 (b-file synthesized from sequence entry)
0 1
1 2
2 7
3 23
4 97
5 362
6 1577
7 6240
8 28009
9 114940
10 522955
11 2196683
12 10100781
13 43162414
14 199901541
15 865225257
16 4029080767
17 17615868458
18 82383872857
19 363146829627
20 1704094090311
21 7562407341100
22 35586905917603
23 158827126064704
24 749146049723839
25 3359778029595732
26 15878598924571931
27 71513032793328165