# A204108 (b-file synthesized from sequence entry)
0 1
1 4
2 56
3 428
4 2741
5 13247
6 52059
7 167502
8 453377
9 1047750
10 2112634
11 3808004
12 6369041
13 10436597
14 18107008
15 36365073
16 90462493
17 282733629
18 1074838721
19 4716194782
20 22663033612
21 114269420056
22 586835167740