# A126397 (b-file synthesized from sequence entry)
0 1
1 10
2 44
3 200
4 918
5 4236
6 19598
7 90790
8 420870
9 1951636
10 9051480
11 41983154
12 194736668
13 903293618
14 4190003458
15 19435777562
16 90155141564
17 418195731384
18 1939853565942
19 8998257693932
20 41739569773726
21 193614349514214