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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 7 |
| 4 | 13 |
| 5 | 23 |
| 6 | 40 |
| 7 | 65 |
| 8 | 106 |
| 9 | 169 |
| 10 | 278 |
| 11 | 443 |
| 12 | 705 |
| 13 | 1117 |
| 14 | 1760 |
| 15 | 2692 |
| 16 | 4151 |
| 17 | 6314 |
| 18 | 9526 |
| 19 | 14127 |
| 20 | 20944 |
| 21 | 30848 |
| 22 | 45589 |
| 23 | 66495 |
| 24 | 96847 |
| 25 | 140840 |
| 26 | 204380 |
| 27 | 293822 |
| 28 | 425859 |
| 29 | 613446 |
| 30 | 880288 |
| 31 | 1258349 |
| 32 | 1794256 |
| 33 | 2545965 |
| 34 | 3623774 |
| 35 | 5123746 |
| 36 | 7207773 |
| 37 | 10159163 |
| 38 | 14273328 |
| 39 | 19925242 |
| 40 | 27893419 |
[1,2,4,7,13,23,40,65,106,169,278,443,705,1117, 1760,2692,4151,6314,9526,14127,20944,30848,45589, 66495,96847,140840,204380,293822,425859,613446, 880288,1258349,1794256,2545965,3623774,5123746, 7207773,10159163,14273328,19925242,27893419] |