# A124531 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 5
4 16
5 62
6 274
7 1332
8 6978
9 38873
10 228090
11 1399625
12 8933506
13 59066261
14 403241292
15 2835267821
16 20490128048
17 151951503074
18 1154770194362
19 8983396031267
20 71473650532630
21 581142591346325
22 4825842125683150