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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 26 |
| 2 | 170 |
| 3 | 1134 |
| 4 | 7618 |
| 5 | 51394 |
| 6 | 347682 |
| 7 | 2356702 |
| 8 | 15997846 |
| 9 | 108719102 |
| 10 | 739490656 |
| 11 | 5033426494 |
| 12 | 34279838804 |
| 13 | 233566488998 |
| 14 | 1591993821168 |
| 15 | 10854281793638 |
| 16 | 74022763799812 |
| 17 | 504910336091974 |
| 18 | 3444546058508588 |
| 19 | 23502038289723148 |
[1,26,170,1134,7618,51394,347682,2356702,15997846, 108719102,739490656,5033426494,34279838804, 233566488998,1591993821168,10854281793638, 74022763799812,504910336091974,3444546058508588, 23502038289723148] |