# A027103 (b-file synthesized from sequence entry)
0 1
1 3
2 11
3 41
4 161
5 633
6 2457
7 9415
8 35663
9 133721
10 497025
11 1833499
12 6719707
13 24488183
14 88798775
15 320596441
16 1152996137
17 4132351481
18 14764629473
19 52606224267
20 186963146315
21 662947211163
22 2345810793755
23 8284654896229