n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 14 |
4 | 50 |
5 | 182 |
6 | 672 |
7 | 2508 |
8 | 9438 |
9 | 35750 |
10 | 136136 |
11 | 520676 |
12 | 1998724 |
13 | 7696444 |
14 | 29716000 |
15 | 115000920 |
16 | 445962870 |
17 | 1732525830 |
18 | 6741529080 |
19 | 26270128500 |
20 | 102501265020 |
21 | 400411345620 |
22 | 1565841089280 |
23 | 6129331763880 |
24 | 24014172955500 |
[1,4,14,50,182,672,2508,9438,35750,136136,520676, 1998724,7696444,29716000,115000920,445962870, 1732525830,6741529080,26270128500,102501265020, 400411345620,1565841089280,6129331763880, 24014172955500] |