# A003758 (b-file synthesized from sequence entry)
1 0
2 3
3 7
4 46
5 193
6 963
7 4470
8 21367
9 100909
10 478924
11 2268405
12 10753173
13 50957032
14 241508575
15 1144553203
16 5424374574
17 25707458901
18 121834519567
19 577405414054
20 2736475971043
21 12968875078785
22 61462896633780