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| n | a(n) |
|---|---|
| 1 | 42 |
| 2 | 329 |
| 3 | 3016 |
| 4 | 30818 |
| 5 | 320270 |
| 6 | 2952734 |
| 7 | 21312696 |
| 8 | 113154831 |
| 9 | 440052087 |
| 10 | 1302939451 |
| 11 | 3104860285 |
| 12 | 6297578921 |
| 13 | 11347942213 |
| 14 | 18725672417 |
| 15 | 28900783485 |
| 16 | 42343299609 |
| 17 | 59523244981 |
| 18 | 80910643793 |
| 19 | 106975520237 |
| 20 | 138187898505 |
[42,329,3016,30818,320270,2952734,21312696, 113154831,440052087,1302939451,3104860285, 6297578921,11347942213,18725672417,28900783485, 42343299609,59523244981,80910643793,106975520237, 138187898505] |