# A299294 (b-file synthesized from sequence entry)
0 2
1 4
2 7
3 17
4 30
5 80
6 143
7 404
8 728
9 2140
10 3876
11 11729
12 21318
13 65952
14 120175
15 378321
16 690690
17 2205168
18 4032015
19 13023324
20 23841480
21 77761008
22 142498692