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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 3 |
| 3 | 4 |
| 4 | 7 |
| 5 | 11 |
| 6 | 18 |
| 7 | 20 |
| 8 | 31 |
| 9 | 51 |
| 10 | 69 |
| 11 | 120 |
| 12 | 189 |
| 13 | 258 |
| 14 | 327 |
| 15 | 358 |
| 16 | 685 |
| 17 | 1043 |
| 18 | 1112 |
| 19 | 2155 |
| 20 | 2513 |
| 21 | 4668 |
| 22 | 7181 |
| 23 | 9694 |
| 24 | 12207 |
| 25 | 14720 |
| 26 | 17233 |
| 27 | 19746 |
| 28 | 22259 |
| 29 | 23371 |
| 30 | 45630 |
| 31 | 65376 |
| 32 | 88747 |
| 33 | 134377 |
| 34 | 223124 |
| 35 | 311871 |
| 36 | 400618 |
| 37 | 465994 |
| 38 | 554741 |
| 39 | 955359 |
| 40 | 1510100 |
| 41 | 2465459 |
| 42 | 3975559 |
[1,2,3,4,7,11,18,20,31,51,69,120,189,258,327,358, 685,1043,1112,2155,2513,4668,7181,9694,12207, 14720,17233,19746,22259,23371,45630,65376,88747, 134377,223124,311871,400618,465994,554741,955359, 1510100,2465459,3975559] |