# A026996 (b-file synthesized from sequence entry)
0 1
1 2
2 11
3 52
4 243
5 1252
6 5773
7 30118
8 138709
9 725582
10 3341873
11 17491838
12 80576661
13 421772338
14 1943163731
15 10170325444
16 46860603595
17 245231971772
18 1130003805543
19 5912852116740
20 27247159299515
21 142559083218360
22 656953537723871
23 3436953931249440
24 15838895888720931
25 82858490576755452