# A168382 (b-file synthesized from sequence entry)
1 3
2 4
3 8
4 24
5 74
6 444
7 1600
8 15684
9 29400
10 50124
11 259224
12 5332128
13 11110428
14 50395440
15 451174728
16 1296895890
17 13314115434
18 32868437466
19 326585290794
20 4788143252148