# A148478 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 20
5 69
6 248
7 929
8 3593
9 14235
10 57459
11 235273
12 975586
13 4091859
14 17331431
15 74022586
16 318434137
17 1378696760
18 6004079607
19 26284438789
20 115608994109
21 510654253982
22 2264354475602
23 10076442899221
24 44987463494993
25 201458045516293
26 904663379767250
27 4072976292757049
28 18381553939082160