n | a(n) |
---|---|
0 | 1 |
1 | 7 |
2 | 42 |
3 | 245 |
4 | 1421 |
5 | 8232 |
6 | 47677 |
7 | 276115 |
8 | 1599066 |
9 | 9260657 |
10 | 53631137 |
11 | 310593360 |
12 | 1798735561 |
13 | 10416995407 |
14 | 60327818922 |
15 | 349375764605 |
16 | 2023335619781 |
17 | 11717718986232 |
18 | 67860683565157 |
19 | 393000752052475 |
20 | 2275980479411226 |
21 | 13180858091511257 |
22 | 76334143284700217 |
[1,7,42,245,1421,8232,47677,276115,1599066, 9260657,53631137,310593360,1798735561,10416995407, 60327818922,349375764605,2023335619781, 11717718986232,67860683565157,393000752052475, 2275980479411226,13180858091511257, 76334143284700217] |