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| n | a(n) |
|---|---|
| 1 | 1267488 |
| 2 | 2368198 |
| 3 | 6432784 |
| 4 | 21891465 |
| 5 | 18851978 |
| 6 | 28891318 |
| 7 | 45398628 |
| 8 | 57587604 |
| 9 | 84247446 |
| 10 | 134567960 |
| 11 | 203688560 |
| 12 | 338663188 |
| 13 | 575964872 |
| 14 | 955930974 |
| 15 | 1656679682 |
| 16 | 2897733371 |
| 17 | 4993925438 |
| 18 | 8874126971 |
| 19 | 15702627844 |
| 20 | 27852983633 |
| 21 | 50014965354 |
[1267488,2368198,6432784,21891465,18851978, 28891318,45398628,57587604,84247446,134567960, 203688560,338663188,575964872,955930974, 1656679682,2897733371,4993925438,8874126971, 15702627844,27852983633,50014965354] |