n | a(n) |
---|---|
1 | 1 |
2 | 9 |
3 | 25 |
4 | 313 |
5 | 1401 |
6 | 15681 |
7 | 90609 |
8 | 909945 |
9 | 6105913 |
10 | 57290209 |
11 | 421304049 |
12 | 3799765201 |
13 | 29595440785 |
14 | 261111392985 |
15 | 2109792275145 |
16 | 18400232046585 |
17 | 152275971653625 |
18 | 1320864136716225 |
19 | 11107129707193809 |
20 | 96160509723165393 |
[1,9,25,313,1401,15681,90609,909945,6105913, 57290209,421304049,3799765201,29595440785, 261111392985,2109792275145,18400232046585, 152275971653625,1320864136716225, 11107129707193809,96160509723165393] |