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| n | a(n) |
|---|---|
| 3 | 11 |
| 4 | 54 |
| 5 | 285 |
| 6 | 1731 |
| 7 | 12145 |
| 8 | 97196 |
| 9 | 874809 |
| 10 | 8748145 |
| 11 | 96229661 |
| 12 | 1154756010 |
| 13 | 15011828221 |
| 14 | 210165595199 |
| 15 | 3152483928105 |
| 16 | 50439742849816 |
| 17 | 857475628447025 |
| 18 | 15434561312046621 |
| 19 | 293256664928885989 |
| 20 | 5865133298577719990 |
| 21 | 123167799270132120021 |
| 22 | 2709691583942906640715 |
| 23 | 62322906430686852736721 |
[11,54,285,1731,12145,97196,874809,8748145, 96229661,1154756010,15011828221,210165595199, 3152483928105,50439742849816,857475628447025, 15434561312046621,293256664928885989, 5865133298577719990,123167799270132120021, 2709691583942906640715,62322906430686852736721] |