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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 312 |
| 3 | 312 |
| 4 | 1240 |
| 5 | 1668 |
| 6 | 1240 |
| 7 | 4752 |
| 8 | 8764 |
| 9 | 8764 |
| 10 | 4752 |
| 11 | 19128 |
| 12 | 44668 |
| 13 | 60002 |
| 14 | 44668 |
| 15 | 19128 |
| 16 | 72736 |
| 17 | 224948 |
| 18 | 343356 |
| 19 | 343356 |
| 20 | 224948 |
| 21 | 72736 |
| 22 | 290112 |
| 23 | 1181206 |
| 24 | 2403292 |
| 25 | 3207808 |
| 26 | 2403292 |
| 27 | 1181206 |
| 28 | 290112 |
| 29 | 1110080 |
| 30 | 6170564 |
| 31 | 16373120 |
| 32 | 31949604 |
[81,312,312,1240,1668,1240,4752,8764,8764,4752, 19128,44668,60002,44668,19128,72736,224948,343356, 343356,224948,72736,290112,1181206,2403292, 3207808,2403292,1181206,290112,1110080,6170564, 16373120,31949604] |