# A007180 (b-file synthesized from sequence entry)
1 3
2 7
3 19
4 53
5 147
6 401
7 1123
8 3137
9 8793
10 24599
11 69287
12 194967
13 550361
14 1552645
15 4393021
16 12425121
17 35213027
18 99771855
19 283162701
20 803538483
21 2283184527
22 6486977223
23 18450767769
24 52477038631
25 149387309235
26 425257329235
27 1211493474199