# A343975 (b-file synthesized from sequence entry)
0 1
1 3
2 15
3 81
4 489
5 3237
6 23211
7 178707
8 1467051
9 12768345
10 117263829
11 1131901521
12 11444383251
13 120847326879
14 1329303053391
15 15197269729689
16 180211641841353
17 2212525627591533
18 28078380387448515
19 367782119667874083
20 4965441830591976339
21 69014083524412401873
22 986364827548578356421