# A052831 (b-file synthesized from sequence entry)
0 0
1 1
2 2
3 4
4 11
5 29
6 91
7 286
8 955
9 3235
10 11240
11 39559
12 141217
13 509059
14 1852248
15 6790372
16 25062536
17 93043286
18 347223013
19 1301777476
20 4900835727
21 18519492431
22 70220471264
23 267080436295
24 1018708832722
25 3895714521787
26 14933608764343
27 57372586025039
28 220869710184189