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| n | a(n) |
|---|---|
| 1 | 46 |
| 2 | 238 |
| 3 | 1230 |
| 4 | 6370 |
| 5 | 32954 |
| 6 | 170634 |
| 7 | 883018 |
| 8 | 4571514 |
| 9 | 23660362 |
| 10 | 122482746 |
| 11 | 633962570 |
| 12 | 3281695226 |
| 13 | 16986365322 |
| 14 | 87927675962 |
| 15 | 455129029834 |
| 16 | 2355889539450 |
| 17 | 12194590587914 |
| 18 | 63122652320442 |
| 19 | 326737675994954 |
| 20 | 1691282074795002 |
[46,238,1230,6370,32954,170634,883018,4571514, 23660362,122482746,633962570,3281695226, 16986365322,87927675962,455129029834, 2355889539450,12194590587914,63122652320442, 326737675994954,1691282074795002] |