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| n | a(n) |
|---|---|
| 1 | 14 |
| 2 | 46 |
| 3 | 174 |
| 4 | 736 |
| 5 | 3406 |
| 6 | 16910 |
| 7 | 88473 |
| 8 | 480524 |
| 9 | 2677917 |
| 10 | 15183903 |
| 11 | 87081621 |
| 12 | 503166559 |
| 13 | 2921501848 |
| 14 | 17016444696 |
| 15 | 99315740914 |
| 16 | 580419063740 |
| 17 | 3394980926065 |
| 18 | 19868915344505 |
| 19 | 116323465551363 |
| 20 | 681180045964207 |
| 21 | 3989535214948663 |
[14,46,174,736,3406,16910,88473,480524,2677917, 15183903,87081621,503166559,2921501848, 17016444696,99315740914,580419063740, 3394980926065,19868915344505,116323465551363, 681180045964207,3989535214948663] |