# A148590 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 6
4 20
5 55
6 206
7 654
8 2563
9 8800
10 35718
11 130207
12 541770
13 2054906
14 8698409
15 34033759
16 146141882
17 585604786
18 2541893678
19 10381735748
20 45477053043
21 188672305570
22 832663144479
23 3499532437359
24 15543200005075
25 66047435923869
26 294951865746390
27 1265127279872257
28 5676545403285557