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n | a(n) |
---|---|
1 | 7 |
2 | 49 |
3 | 315 |
4 | 1981 |
5 | 12327 |
6 | 76237 |
7 | 469623 |
8 | 2884909 |
9 | 17686215 |
10 | 108259885 |
11 | 661872471 |
12 | 4042575277 |
13 | 24671450343 |
14 | 150466937773 |
15 | 917151735159 |
16 | 5587651325485 |
17 | 34027698639111 |
18 | 207144227712301 |
19 | 1260572274312087 |
20 | 7668877406965933 |
[7,49,315,1981,12327,76237,469623,2884909, 17686215,108259885,661872471,4042575277, 24671450343,150466937773,917151735159, 5587651325485,34027698639111,207144227712301, 1260572274312087,7668877406965933] |