n | a(n) |
---|---|
0 | 4 |
1 | 17 |
2 | 65 |
3 | 244 |
4 | 912 |
5 | 3405 |
6 | 12709 |
7 | 47432 |
8 | 177020 |
9 | 660649 |
10 | 2465577 |
11 | 9201660 |
12 | 34341064 |
13 | 128162597 |
14 | 478309325 |
15 | 1785074704 |
16 | 6661989492 |
17 | 24862883265 |
18 | 92789543569 |
19 | 346295291012 |
20 | 1292391620480 |
21 | 4823271190909 |
22 | 18000693143157 |
[4,17,65,244,912,3405,12709,47432,177020,660649, 2465577,9201660,34341064,128162597,478309325, 1785074704,6661989492,24862883265,92789543569, 346295291012,1292391620480,4823271190909, 18000693143157] |