# A150538 (b-file synthesized from sequence entry)
0 1
1 2
2 7
3 26
4 103
5 422
6 1786
7 7645
8 33271
9 146306
10 648140
11 2893384
12 12988212
13 58575492
14 265345857
15 1206196837
16 5500661829
17 25157087237
18 115338984259
19 530013502114
20 2440558371332
21 11258873388678
22 52029146530007
23 240811236082350
24 1116177768936834
25 5180510647950505
26 24074102190288726
27 112003280535891910