| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 4 |
| 3 | 12 |
| 4 | 84 |
| 5 | 132 |
| 6 | 12324 |
| 7 | 15960 |
| 8 | 26280 |
| 9 | 27300 |
| 10 | 66660 |
| 11 | 115188 |
| 12 | 9777193284 |
| 13 | 23465263884 |
| 14 | 48701491080 |
| 15 | 40900397690640 |
| 16 | 680008604512020 |
| 17 | 127049882801497788 |
| 18 | 247290967245178188 |
| 19 | 335580091290976716 |
| 20 | 1045885075937364972 |
| 21 | 1607091702050097396 |
| 22 | 3419793695168900508 |
| 23 | 5138020847719969956 |
| 24 | 10059508412964112740 |
[3,4,12,84,132,12324,15960,26280,27300,66660, 115188,9777193284,23465263884,48701491080, 40900397690640,680008604512020,127049882801497788, 247290967245178188,335580091290976716, 1045885075937364972,1607091702050097396, 3419793695168900508,5138020847719969956, 10059508412964112740] |