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| n | a(n) |
|---|---|
| 1 | 148 |
| 2 | 4102 |
| 3 | 40182 |
| 4 | 240829 |
| 5 | 1122522 |
| 6 | 4480391 |
| 7 | 15921905 |
| 8 | 51343083 |
| 9 | 152072846 |
| 10 | 417672794 |
| 11 | 1072431538 |
| 12 | 2592681873 |
| 13 | 5938784236 |
| 14 | 12959932409 |
| 15 | 27074244297 |
| 16 | 54373767111 |
| 17 | 105367428574 |
| 18 | 197658533498 |
| 19 | 359961664018 |
| 20 | 638001956409 |
[148,4102,40182,240829,1122522,4480391,15921905, 51343083,152072846,417672794,1072431538, 2592681873,5938784236,12959932409,27074244297, 54373767111,105367428574,197658533498, 359961664018,638001956409] |