n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 8 |
3 | 34 |
4 | 140 |
5 | 586 |
6 | 2476 |
7 | 10522 |
8 | 45048 |
9 | 194210 |
10 | 842672 |
11 | 3678946 |
12 | 16155140 |
13 | 71328210 |
14 | 316536532 |
15 | 1411398138 |
16 | 6321140080 |
17 | 28426660498 |
18 | 128325523272 |
19 | 581349815466 |
20 | 2642337533500 |
21 | 12046547596514 |
22 | 55076433751372 |
23 | 252470682559914 |
[1,2,8,34,140,586,2476,10522,45048,194210,842672, 3678946,16155140,71328210,316536532,1411398138, 6321140080,28426660498,128325523272,581349815466, 2642337533500,12046547596514,55076433751372, 252470682559914] |