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| n | a(n) |
|---|---|
| 1 | 455 |
| 2 | 3185 |
| 3 | 22295 |
| 4 | 145873 |
| 5 | 980031 |
| 6 | 6645821 |
| 7 | 44678543 |
| 8 | 300535053 |
| 9 | 2025793471 |
| 10 | 13644835113 |
| 11 | 91879275469 |
| 12 | 618858084619 |
| 13 | 4168290681519 |
| 14 | 28073432645895 |
| 15 | 189079333842687 |
| 16 | 1273493381875147 |
| 17 | 8577194140275861 |
| 18 | 57768891197339641 |
[455,3185,22295,145873,980031,6645821,44678543, 300535053,2025793471,13644835113,91879275469, 618858084619,4168290681519,28073432645895, 189079333842687,1273493381875147,8577194140275861, 57768891197339641] |