# A026704 (b-file synthesized from sequence entry)
0 1
1 3
2 13
3 61
4 293
5 1421
6 6925
7 33839
8 165621
9 811431
10 3978065
11 19511079
12 95723669
13 469727963
14 2305345429
15 11315403365
16 55543851357
17 272662287413
18 1338539083593
19 6571272384501
20 32260944744493
21 158384084362585
22 777590799685969