# A125280 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 15
4 53
5 217
6 1011
7 5260
8 30041
9 185677
10 1228209
11 8620874
12 63792445
13 495163451
14 4015888557
15 33923543492
16 297706713081
17 2708377382444
18 25495655264883
19 247952347547483
20 2487743315817023
21 25717746952124842