# A162441 (b-file synthesized from sequence entry)
2 3
3 15
4 35
5 315
6 693
7 1001
8 6435
9 109395
10 230945
11 969969
12 2028117
13 16900975
14 35102025
15 145422675
16 20036013
17 9917826435
18 20419054425
19 27981667175
20 172308161025
21 282585384081
22 964378691705
23 11835556670925
24 24185702762325