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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 27 |
| 2 | 148 |
| 3 | 509 |
| 4 | 1350 |
| 5 | 3031 |
| 6 | 6056 |
| 7 | 11097 |
| 8 | 19018 |
| 9 | 30899 |
| 10 | 48060 |
| 11 | 72085 |
| 12 | 104846 |
| 13 | 148527 |
| 14 | 205648 |
| 15 | 279089 |
| 16 | 372114 |
| 17 | 488395 |
| 18 | 632036 |
| 19 | 807597 |
| 20 | 1020118 |
| 21 | 1275143 |
| 22 | 1578744 |
| 23 | 1937545 |
| 24 | 2358746 |
| 25 | 2850147 |
| 26 | 3420172 |
| 27 | 4077893 |
| 28 | 4833054 |
| 29 | 5696095 |
[2,27,148,509,1350,3031,6056,11097,19018,30899, 48060,72085,104846,148527,205648,279089,372114, 488395,632036,807597,1020118,1275143,1578744, 1937545,2358746,2850147,3420172,4077893,4833054, 5696095] |