# A005324 (b-file synthesized from sequence entry)
4 1
5 5
6 20
7 70
8 230
9 726
10 2235
11 6765
12 20240
13 60060
14 177177
15 520455
16 1524120
17 4453320
18 12991230
19 37854954
20 110218905
21 320751445
22 933149470
23 2714401580
24 7895719634
25 22969224850
26 66829893650
27 194486929650
28 566141346225
29 1648500576021