# A061178 (b-file synthesized from sequence entry)
0 1
1 9
2 51
3 233
4 942
5 3522
6 12473
7 42447
8 140109
9 451441
10 1426380
11 4434420
12 13599505
13 41225349
14 123723351
15 368080793
16 1086665562
17 3186317718
18 9286256393
19 26916587307
20 77634928209
21 222920650081