# A123611 (b-file synthesized from sequence entry)
0 1
1 2
2 4
3 8
4 20
5 52
6 160
7 492
8 1620
9 5408
10 18504
11 64132
12 225440
13 800048
14 2865720
15 10341208
16 37568340
17 137270956
18 504176992
19 1860277044
20 6892335720
21 25631327688
22 95640894056
23 357975249028
24 1343650267296
25 5056424257552