# A153395 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 13
4 69
5 417
6 2754
7 19373
8 142732
9 1088875
10 8533278
11 68308641
12 556242792
13 4593529882
14 38380159009
15 323860968709
16 2756019889146
17 23625552635184
18 203823793118268
19 1768357487401595
20 15418860927887232
21 135042445950316514