# A307075 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 15
4 47
5 160
6 517
7 1721
8 5668
9 18687
10 61687
11 203448
12 671253
13 2214377
14 7305308
15 24100319
16 79506903
17 262294336
18 865310405
19 2854666385
20 9417565852
21 31068622271
22 102495625503
23 338133855032
24 1115506197957
25 3680063534409
26 12140557957708
27 40051794232519
28 132131177728807