# A148454 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 17
5 57
6 205
7 745
8 2875
9 11305
10 45332
11 186380
12 774303
13 3267037
14 13949978
15 60078464
16 261420213
17 1145680231
18 5056693164
19 22468775276
20 100367233789
21 450802933329
22 2034271914025
23 9219038987323
24 41952247315081
25 191591933975581
26 878015079137772
27 4036487462078620
28 18610889183478567