n | a(n) |
---|---|
0 | 1 |
1 | 15 |
2 | 129 |
3 | 877 |
4 | 5280 |
5 | 29658 |
6 | 159742 |
7 | 838038 |
8 | 4323003 |
9 | 22057825 |
10 | 111750519 |
11 | 563535483 |
12 | 2833221970 |
13 | 14216330916 |
14 | 71243079660 |
15 | 356731958812 |
16 | 1785306330981 |
17 | 8931761831331 |
18 | 44675371382365 |
[1,15,129,877,5280,29658,159742,838038,4323003, 22057825,111750519,563535483,2833221970, 14216330916,71243079660,356731958812, 1785306330981,8931761831331,44675371382365] |