n | a(n) |
---|---|
0 | 1 |
1 | 8 |
2 | 45 |
3 | 211 |
4 | 891 |
5 | 3510 |
6 | 13170 |
7 | 47672 |
8 | 167898 |
9 | 578769 |
10 | 1961103 |
11 | 6552549 |
12 | 21641343 |
13 | 70784235 |
14 | 229620285 |
15 | 739640331 |
16 | 2368022638 |
17 | 7541358405 |
18 | 23905443556 |
19 | 75468582776 |
20 | 237388273398 |
21 | 744299007994 |
22 | 2326899224352 |
[1,8,45,211,891,3510,13170,47672,167898,578769, 1961103,6552549,21641343,70784235,229620285, 739640331,2368022638,7541358405,23905443556, 75468582776,237388273398,744299007994, 2326899224352] |