# A196417 (b-file synthesized from sequence entry)
1 1
2 2
3 5
4 14
5 42
6 131
7 417
8 1341
9 4334
10 14042
11 45562
12 148029
13 481804
14 1572625
15 5156025
16 17018505
17 56717910
18 191540940
19 658084182
20 2309516616