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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 27 |
| 3 | 55 |
| 4 | 356 |
| 5 | 681 |
| 6 | 1177 |
| 7 | 1874 |
| 8 | 3207 |
| 9 | 5116 |
| 10 | 7157 |
| 11 | 9290 |
| 12 | 13191 |
| 13 | 21319 |
| 14 | 32012 |
| 15 | 48525 |
| 16 | 68046 |
| 17 | 92647 |
| 18 | 119624 |
| 19 | 170925 |
| 20 | 267286 |
| 21 | 397439 |
| 22 | 557280 |
| 23 | 720481 |
| 24 | 897142 |
| 25 | 1111415 |
| 26 | 1361736 |
| 27 | 1637569 |
| 28 | 1933910 |
| 29 | 2240091 |
| 30 | 2629684 |
| 31 | 3116561 |
| 32 | 3612090 |
| 33 | 4154503 |
[6,27,55,356,681,1177,1874,3207,5116,7157,9290, 13191,21319,32012,48525,68046,92647,119624,170925, 267286,397439,557280,720481,897142,1111415, 1361736,1637569,1933910,2240091,2629684,3116561, 3612090,4154503] |