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| n | a(n) |
|---|---|
| 1 | 49 |
| 2 | 189 |
| 3 | 812 |
| 4 | 3832 |
| 5 | 19611 |
| 6 | 107818 |
| 7 | 631917 |
| 8 | 3920234 |
| 9 | 25559691 |
| 10 | 173884143 |
| 11 | 1225577275 |
| 12 | 8889979382 |
| 13 | 65971409679 |
| 14 | 498317038285 |
| 15 | 3815480847788 |
| 16 | 29515868843207 |
| 17 | 230098500219893 |
| 18 | 1804162547508522 |
| 19 | 14206951882147476 |
[49,189,812,3832,19611,107818,631917,3920234, 25559691,173884143,1225577275,8889979382, 65971409679,498317038285,3815480847788, 29515868843207,230098500219893,1804162547508522, 14206951882147476] |