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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 26 |
| 2 | 646 |
| 3 | 15818 |
| 4 | 385822 |
| 5 | 9401330 |
| 6 | 229023958 |
| 7 | 5578844858 |
| 8 | 135894050926 |
| 9 | 3310204057250 |
| 10 | 80632220390758 |
| 11 | 1964094376340522 |
| 12 | 47842741143064894 |
| 13 | 1165385872796078546 |
| 14 | 28387257791866411894 |
| 15 | 691476036231391881242 |
| 16 | 16843441238514542846350 |
| 17 | 410283940250387099210114 |
[1,26,646,15818,385822,9401330,229023958, 5578844858,135894050926,3310204057250, 80632220390758,1964094376340522,47842741143064894, 1165385872796078546,28387257791866411894, 691476036231391881242,16843441238514542846350, 410283940250387099210114] |