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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 5 |
| 5 | 8 |
| 6 | 13 |
| 7 | 18 |
| 8 | 29 |
| 9 | 48 |
| 10 | 81 |
| 11 | 136 |
| 12 | 228 |
| 13 | 420 |
| 14 | 747 |
| 15 | 1326 |
| 16 | 2468 |
| 17 | 4520 |
| 18 | 8296 |
| 19 | 15232 |
| 20 | 28196 |
| 21 | 52504 |
| 22 | 96936 |
| 23 | 181699 |
| 24 | 340998 |
| 25 | 640091 |
| 26 | 1207386 |
| 27 | 2282956 |
| 28 | 4328536 |
| 29 | 8211989 |
| 30 | 15623003 |
| 31 | 29787092 |
| 32 | 56831499 |
| 33 | 108591159 |
| 34 | 207851120 |
| 35 | 398222781 |
| 36 | 763760138 |
| 37 | 1466661416 |
| 38 | 2819529654 |
| 39 | 5425826011 |
| 40 | 10450403468 |
[1,2,4,5,8,13,18,29,48,81,136,228,420,747,1326, 2468,4520,8296,15232,28196,52504,96936,181699, 340998,640091,1207386,2282956,4328536,8211989, 15623003,29787092,56831499,108591159,207851120, 398222781,763760138,1466661416,2819529654, 5425826011,10450403468] |