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| n | a(n) |
|---|---|
| 2 | 3 |
| 3 | 11 |
| 4 | 28 |
| 5 | 63 |
| 6 | 143 |
| 7 | 304 |
| 8 | 699 |
| 9 | 1490 |
| 10 | 3460 |
| 11 | 7527 |
| 12 | 17687 |
| 13 | 38008 |
| 14 | 88803 |
| 15 | 194426 |
| 16 | 458476 |
| 17 | 986577 |
| 18 | 2306822 |
| 19 | 5052901 |
[3,11,28,63,143,304,699,1490,3460,7527,17687, 38008,88803,194426,458476,986577,2306822,5052901] |