| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 14 |
| 3 | 67 |
| 4 | 342 |
| 5 | 1790 |
| 6 | 9580 |
| 7 | 52035 |
| 8 | 285990 |
| 9 | 1586298 |
| 10 | 8864676 |
| 11 | 49844238 |
| 12 | 281719164 |
| 13 | 1599314652 |
| 14 | 9113895960 |
| 15 | 52109150691 |
| 16 | 298806189318 |
| 17 | 1717855010274 |
| 18 | 9898828072692 |
| 19 | 57158263594458 |
| 20 | 330662400729492 |
| 21 | 1916134078427556 |
| 22 | 11120825740970088 |
| 23 | 64634042348169294 |
| 24 | 376139362185133404 |
| 25 | 2191569966890629380 |
[1,3,14,67,342,1790,9580,52035,285990,1586298, 8864676,49844238,281719164,1599314652,9113895960, 52109150691,298806189318,1717855010274, 9898828072692,57158263594458,330662400729492, 1916134078427556,11120825740970088, 64634042348169294,376139362185133404, 2191569966890629380] |