# A371481 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 15
4 52
5 335
6 2031
7 12880
8 102614
9 802443
10 6956995
11 64721756
12 633754320
13 6551212057
14 71375943289
15 820250162880
16 9747543483676
17 121775559807881
18 1580353806494781
19 21246545374234378
20 296590230821338520
21 4280692741624646151
22 63852747607056438283