# A157519 (b-file synthesized from sequence entry)
0 1
1 6
2 30
3 150
4 726
5 3510
6 16734
7 79518
8 375246
9 1766382
10 8278638
11 38721366
12 180556206
13 840524742
14 3903866526
15 18106798830
16 83832778110
17 387690560718
18 1790330065854
19 8259528315558
20 38059497518214
21 175228328442174
22 805959153119262
23 3704270575724550