n | a(n) |
---|---|
0 | 2 |
1 | 5 |
2 | 15 |
3 | 48 |
4 | 169 |
5 | 618 |
6 | 2319 |
7 | 8804 |
8 | 33649 |
9 | 129046 |
10 | 495779 |
11 | 1906520 |
12 | 7335029 |
13 | 28227578 |
14 | 108642983 |
15 | 418176700 |
16 | 1609656953 |
17 | 6196050718 |
18 | 23850681323 |
19 | 91809753632 |
20 | 353409321213 |
[2,5,15,48,169,618,2319,8804,33649,129046,495779, 1906520,7335029,28227578,108642983,418176700, 1609656953,6196050718,23850681323,91809753632, 353409321213] |