# A020113 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 1
4 2
5 9
6 43
7 267
8 1928
9 15845
10 146123
11 1493701
12 16762640
13 204876709
14 2708925369
15 38526938569
16 586465620431
17 9513775620310
18 163848357905336
19 2985681188497228
20 57391427290002262
21 1160582196308934616
22 24630133277222945727
23 547336295049398793928