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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 390 |
| 3 | 390 |
| 4 | 1885 |
| 5 | 2586 |
| 6 | 1885 |
| 7 | 8876 |
| 8 | 17114 |
| 9 | 17114 |
| 10 | 8876 |
| 11 | 41473 |
| 12 | 106184 |
| 13 | 147683 |
| 14 | 106184 |
| 15 | 41473 |
| 16 | 193372 |
| 17 | 645208 |
| 18 | 1064688 |
| 19 | 1064688 |
| 20 | 645208 |
| 21 | 193372 |
| 22 | 912752 |
| 23 | 4152180 |
| 24 | 8747914 |
| 25 | 11752026 |
| 26 | 8747914 |
| 27 | 4152180 |
| 28 | 912752 |
| 29 | 4290712 |
| 30 | 26549772 |
| 31 | 75546260 |
[81,390,390,1885,2586,1885,8876,17114,17114,8876, 41473,106184,147683,106184,41473,193372,645208, 1064688,1064688,645208,193372,912752,4152180, 8747914,11752026,8747914,4152180,912752,4290712, 26549772,75546260] |