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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 4 |
| 3 | 5 |
| 4 | 6 |
| 5 | 8 |
| 6 | 11 |
| 7 | 15 |
| 8 | 21 |
| 9 | 30 |
| 10 | 43 |
| 11 | 62 |
| 12 | 90 |
| 13 | 131 |
| 14 | 191 |
| 15 | 279 |
| 16 | 408 |
| 17 | 597 |
| 18 | 874 |
| 19 | 1280 |
| 20 | 1875 |
| 21 | 2747 |
| 22 | 4025 |
| 23 | 5898 |
| 24 | 8643 |
| 25 | 12666 |
| 26 | 18562 |
| 27 | 27203 |
| 28 | 39867 |
| 29 | 58427 |
| 30 | 85628 |
| 31 | 125493 |
| 32 | 183918 |
| 33 | 269544 |
| 34 | 395035 |
| 35 | 578951 |
| 36 | 848493 |
| 37 | 1243526 |
| 38 | 1822475 |
| 39 | 2670966 |
| 40 | 3914490 |
| 41 | 5736963 |
| 42 | 8407927 |
[4,4,5,6,8,11,15,21,30,43,62,90,131,191,279,408, 597,874,1280,1875,2747,4025,5898,8643,12666,18562, 27203,39867,58427,85628,125493,183918,269544, 395035,578951,848493,1243526,1822475,2670966, 3914490,5736963,8407927] |