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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 5 |
| 2 | 129 |
| 3 | 458 |
| 4 | 1376 |
| 5 | 4130 |
| 6 | 12392 |
| 7 | 37178 |
| 8 | 72980 |
| 9 | 114938 |
| 10 | 218942 |
| 11 | 287792 |
[2,5,129,458,1376,4130,12392,37178,72980,114938, 218942,287792] |