# A337721 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 4
4 9
5 23
6 62
7 179
8 549
9 1773
10 6003
11 21233
12 78187
13 298894
14 1183387
15 4842221
16 20438964
17 88849325
18 397183838
19 1823456223
20 8587051052
21 41434641992
22 204654311282
23 1033757421996
24 5335693879201
25 28118977852767
26 151192761513229
27 828884087889407