# A153197 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 15
4 51
5 189
6 748
7 3128
8 13731
9 62969
10 300552
11 1488704
12 7634723
13 40464741
14 221311617
15 1247444859
16 7238458309
17 43196661875
18 264878725516
19 1667564565616
20 10770316016557
21 71314258947903
22 483765644021787
23 3359905164274725