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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 4 |
| 3 | 6 |
| 4 | 9 |
| 5 | 15 |
| 6 | 21 |
| 7 | 29 |
| 8 | 45 |
| 9 | 69 |
| 10 | 100 |
| 11 | 152 |
| 12 | 236 |
| 13 | 349 |
| 14 | 517 |
| 15 | 789 |
| 16 | 1185 |
| 17 | 1757 |
| 18 | 2653 |
| 19 | 4014 |
| 20 | 5992 |
| 21 | 8986 |
| 22 | 13573 |
| 23 | 20363 |
| 24 | 30485 |
| 25 | 45901 |
| 26 | 69041 |
| 27 | 103481 |
| 28 | 155468 |
| 29 | 233908 |
| 30 | 351104 |
| 31 | 527033 |
| 32 | 792405 |
| 33 | 1190493 |
| 34 | 1787129 |
| 35 | 2685209 |
| 36 | 4035261 |
| 37 | 6059758 |
| 38 | 9101828 |
| 39 | 13676670 |
| 40 | 20544125 |
[1,2,4,6,9,15,21,29,45,69,100,152,236,349,517,789, 1185,1757,2653,4014,5992,8986,13573,20363,30485, 45901,69041,103481,155468,233908,351104,527033, 792405,1190493,1787129,2685209,4035261,6059758, 9101828,13676670,20544125] |