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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 16 |
| 3 | 81 |
| 4 | 471 |
| 5 | 1056 |
| 6 | 1381 |
| 7 | 6906 |
| 8 | 6906 |
| 9 | 17956 |
| 10 | 34531 |
| 11 | 40056 |
| 12 | 40056 |
| 13 | 200281 |
| 14 | 200281 |
| 15 | 200281 |
| 16 | 200281 |
| 17 | 520731 |
| 18 | 520731 |
| 19 | 1001406 |
| 20 | 1001406 |
| 21 | 1482081 |
| 22 | 1482081 |
| 23 | 1482081 |
| 24 | 1482081 |
| 25 | 7410406 |
| 26 | 7410406 |
| 27 | 7410406 |
| 28 | 7410406 |
| 29 | 7410406 |
| 30 | 7410406 |
| 31 | 7410406 |
| 32 | 7410406 |
[2,16,81,471,1056,1381,6906,6906,17956,34531, 40056,40056,200281,200281,200281,200281,520731, 520731,1001406,1001406,1482081,1482081,1482081, 1482081,7410406,7410406,7410406,7410406,7410406, 7410406,7410406,7410406] |