n | a(n) |
---|---|
1 | 4 |
2 | 16 |
3 | 62 |
4 | 240 |
5 | 914 |
6 | 3508 |
7 | 13297 |
8 | 50461 |
9 | 191050 |
10 | 722932 |
11 | 2726415 |
12 | 10295319 |
13 | 38671908 |
14 | 146751022 |
15 | 550500089 |
16 | 2073212701 |
17 | 7808201806 |
18 | 29400052201 |
19 | 110000818929 |
[4,16,62,240,914,3508,13297,50461,191050,722932, 2726415,10295319,38671908,146751022,550500089, 2073212701,7808201806,29400052201,110000818929] |