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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 33 |
| 2 | 853 |
| 3 | 20853 |
| 4 | 502789 |
| 5 | 12080901 |
| 6 | 290025541 |
| 7 | 6961116741 |
| 8 | 167069824837 |
| 9 | 4009693935429 |
| 10 | 96232763288389 |
| 11 | 2309586971953989 |
| 12 | 55430091245099845 |
| 13 | 1330322213391637317 |
| 14 | 31927733262454774597 |
| 15 | 766265599145247529797 |
| 16 | 18390374384563938483013 |
| 17 | 441368985260002510461765 |
[1,33,853,20853,502789,12080901,290025541, 6961116741,167069824837,4009693935429, 96232763288389,2309586971953989,55430091245099845, 1330322213391637317,31927733262454774597, 766265599145247529797,18390374384563938483013, 441368985260002510461765] |