# A052890 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 16
5 49
6 153
7 493
8 1623
9 5460
10 18625
11 64373
12 224843
13 792546
14 2815443
15 10070115
16 36233440
17 131063713
18 476320360
19 1738401482
20 6368750019
21 23413000913
22 86342448134
23 319329672079
24 1184129737292
25 4401635480735
26 16398478453303
27 61220441044887