# A047119 (b-file synthesized from sequence entry)
0 1
1 2
2 9
3 44
4 250
5 1418
6 8567
7 51635
8 321039
9 1996724
10 12628528
11 80011583
12 511889348
13 3282172599
14 21172582733
15 136879748346
16 888481523846
17 5778565689270
18 37689416642042
19 246245960185175
20 1612234572834084