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| n | a(n) |
|---|---|
| 3 | 3 |
| 4 | 12 |
| 5 | 75 |
| 6 | 369 |
| 7 | 2744 |
| 8 | 5284 |
| 9 | 47502 |
| 10 | 75010 |
| 11 | 447777 |
| 12 | 305928 |
| 13 | 2826213 |
| 14 | 2737574 |
| 15 | 13415370 |
| 16 | 11249496 |
| 17 | 51687174 |
| 18 | 20411883 |
| 19 | 169877974 |
| 20 | 130816100 |
| 21 | 491279628 |
| 22 | 374381117 |
| 23 | 1284687103 |
| 24 | 589507200 |
| 25 | 3090684250 |
| 26 | 2235035062 |
| 27 | 6923313000 |
| 28 | 4868270582 |
| 29 | 14611365945 |
| 30 | 4263149880 |
[3,12,75,369,2744,5284,47502,75010,447777,305928, 2826213,2737574,13415370,11249496,51687174, 20411883,169877974,130816100,491279628,374381117, 1284687103,589507200,3090684250,2235035062, 6923313000,4868270582,14611365945,4263149880] |