# A024961 (b-file synthesized from sequence entry)
1 2
2 1
3 3
4 6
5 12
6 33
7 84
8 204
9 507
10 1410
11 3828
12 10185
13 27048
14 78720
15 222051
16 613770
17 1704360
18 4978050
19 14312460
20 40615440
21 115306545
22 341021994
23 994082808
24 2865120612
25 8271370236
26 24556630128
27 72215184450
28 210645965832
29 614238371328
30 1836536385786