n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 28 |
3 | 173 |
4 | 741 |
5 | 2993 |
6 | 11993 |
7 | 47025 |
8 | 187164 |
9 | 745536 |
10 | 2979693 |
11 | 11916417 |
12 | 47647817 |
13 | 190538997 |
14 | 762243257 |
15 | 3048866261 |
[1,4,28,173,741,2993,11993,47025,187164,745536, 2979693,11916417,47647817,190538997,762243257, 3048866261] |