# A114311 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 3
4 18
5 110
6 705
7 5019
8 40292
9 362844
10 3628755
11 39916745
12 479001534
13 6227020722
14 87178291109
15 1307674367895
16 20922789887880
17 355687428095864
18 6402373705727847
19 121645100408831829
20 2432902008176639810
21 51090942171709439790
22 1124000727777607679769