n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 7 |
3 | 31 |
4 | 151 |
5 | 721 |
6 | 3457 |
7 | 16561 |
8 | 79351 |
9 | 380191 |
10 | 1821607 |
11 | 8727841 |
12 | 41817601 |
13 | 200360161 |
14 | 959983207 |
15 | 4599555871 |
16 | 22037796151 |
17 | 105589424881 |
18 | 505909328257 |
19 | 2423957216401 |
20 | 11613876753751 |
21 | 55645426552351 |
22 | 266613256008007 |
[1,1,7,31,151,721,3457,16561,79351,380191,1821607, 8727841,41817601,200360161,959983207,4599555871, 22037796151,105589424881,505909328257, 2423957216401,11613876753751,55645426552351, 266613256008007] |