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| n | a(n) |
|---|---|
| 0 | 21 |
| 1 | 22 |
| 2 | 43 |
| 3 | 65 |
| 4 | 108 |
| 5 | 389 |
| 6 | 1275 |
| 7 | 27164 |
| 8 | 82767 |
| 9 | 275465 |
| 10 | 358232 |
| 11 | 633697 |
| 12 | 991929 |
| 13 | 1625626 |
| 14 | 69268221 |
| 15 | 70893847 |
| 16 | 140162068 |
| 17 | 211055915 |
| 18 | 351217983 |
| 19 | 1264709864 |
| 20 | 4145347575 |
| 21 | 88317008939 |
| 22 | 269096374392 |
| 23 | 895606132115 |
[21,22,43,65,108,389,1275,27164,82767,275465, 358232,633697,991929,1625626,69268221,70893847, 140162068,211055915,351217983,1264709864, 4145347575,88317008939,269096374392,895606132115] |