# A367047 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 21
4 136
5 941
6 6864
7 52006
8 405312
9 3228654
10 26170764
11 215166638
12 1789998808
13 15040070843
14 127450104568
15 1087988783356
16 9347556057040
17 80766068931498
18 701359680126592
19 6117887649100980
20 53581405635501276
21 470988258063461393