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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 25 |
| 5 | 88 |
| 6 | 49 |
| 7 | 219 |
| 8 | 416 |
| 9 | 4896 |
| 10 | 4523 |
| 11 | 68559 |
| 12 | 40460 |
| 13 | 613441 |
| 14 | 791549 |
| 15 | 487091 |
| 16 | 1123701 |
| 17 | 16678867 |
| 18 | 4363873 |
| 19 | 121113412 |
| 20 | 24252821 |
| 21 | 5893113 |
| 22 | 7436454 |
| 23 | 217867766 |
| 24 | 306700798 |
| 25 | 14495108003 |
| 26 | 11420114688 |
| 27 | 78503059517 |
| 28 | 93975842393 |
[1,3,7,25,88,49,219,416,4896,4523,68559,40460, 613441,791549,487091,1123701,16678867,4363873, 121113412,24252821,5893113,7436454,217867766, 306700798,14495108003,11420114688,78503059517, 93975842393] |