# A126413 (b-file synthesized from sequence entry)
0 1
1 26
2 124
3 600
4 2918
5 14236
6 69598
7 340774
8 1670480
9 8196280
10 40245610
11 197738510
12 972059180
13 4780678950
14 23520964308
15 115762376468
16 569912653284
17 2806482718416
18 13823453975028
19 68101963757630
20 335568968553598