# A099748 (b-file synthesized from sequence entry)
0 1
1 2
2 21
3 225
4 3328
5 33518
6 257909
7 1544907
8 7657779
9 32454761
10 121100938
11 405911691
12 1242567609
13 3517715389
14 9305703095
15 23194232130
16 54848107788
17 123760738779
18 267768667311
19 557808040826
20 1122804257019
21 2190539008704
22 4153269969884
23 7670791137960