# A075207 (b-file synthesized from sequence entry)
1 1
2 1
3 3
4 6
5 12
6 36
7 60
8 209
9 387
10 1054
11 1468
12 6895
13 7001
14 23920
15 49496
16 126732
17 146046
18 638800
19 647502
20 2772935
21 4162861