# A297201 (b-file synthesized from sequence entry)
0 1
1 2
2 4
3 10
4 34
5 148
6 786
7 4920
8 35446
9 288822
10 2625844
11 26349340
12 289248224
13 3447860798
14 44348374106
15 612228009210
16 9028698146956
17 141655958846642
18 2355980548168314
19 41403643674710280
20 766627753698325214