| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 211 |
| 3 | 537 |
| 4 | 1523 |
| 5 | 4309 |
| 6 | 12723 |
| 7 | 37701 |
| 8 | 113771 |
| 9 | 344885 |
| 10 | 1055235 |
| 11 | 3241909 |
| 12 | 10016411 |
| 13 | 31053157 |
| 14 | 96649875 |
| 15 | 301652453 |
| 16 | 944231531 |
| 17 | 2962345045 |
| 18 | 9314825443 |
| 19 | 29344133653 |
| 20 | 92608555963 |
| 21 | 292718067013 |
| 22 | 926588796211 |
| 23 | 2936874197061 |
| 24 | 9319996691467 |
[81,211,537,1523,4309,12723,37701,113771,344885, 1055235,3241909,10016411,31053157,96649875, 301652453,944231531,2962345045,9314825443, 29344133653,92608555963,292718067013,926588796211, 2936874197061,9319996691467] |