| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 51 |
| 3 | 32 |
| 4 | 155 |
| 5 | 596 |
| 6 | 1641 |
| 7 | 5415 |
| 8 | 30207 |
| 9 | 124598 |
| 10 | 500772 |
| 11 | 2563187 |
| 12 | 11938158 |
| 13 | 52758745 |
| 14 | 263350294 |
| 15 | 1254691561 |
| 16 | 5814881820 |
| 17 | 28525545716 |
| 18 | 136746379603 |
| 19 | 646825243649 |
| 20 | 3141919967404 |
| 21 | 15089914588281 |
| 22 | 72017487916126 |
| 23 | 348004527241026 |
[3,51,32,155,596,1641,5415,30207,124598,500772, 2563187,11938158,52758745,263350294,1254691561, 5814881820,28525545716,136746379603,646825243649, 3141919967404,15089914588281,72017487916126, 348004527241026] |