# A094291 (b-file synthesized from sequence entry)
1 1
2 2
3 4
4 9
5 18
6 40
7 100
8 225
9 525
10 1225
11 3136
12 7056
13 17640
14 44100
15 108900
16 261360
17 637065
18 1656369
19 4008004
20 10020010
21 25050025
22 64128064
23 155739584
24 393853824
25 1012766976
26 2538950544
27 6347376360
28 15868440900
29 41408180100
30 102252852900