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| n | a(n) |
|---|---|
| 1 | 269 |
| 2 | 1121 |
| 3 | 5077 |
| 4 | 21854 |
| 5 | 92217 |
| 6 | 391926 |
| 7 | 1669286 |
| 8 | 7114859 |
| 9 | 30309034 |
| 10 | 129016023 |
| 11 | 549319029 |
| 12 | 2339546992 |
| 13 | 9963141837 |
| 14 | 42425232242 |
| 15 | 180661430018 |
| 16 | 769335984165 |
| 17 | 3276146397830 |
| 18 | 13951092432171 |
| 19 | 59409215103985 |
| 20 | 252988054381890 |
[269,1121,5077,21854,92217,391926,1669286,7114859, 30309034,129016023,549319029,2339546992, 9963141837,42425232242,180661430018,769335984165, 3276146397830,13951092432171,59409215103985, 252988054381890] |