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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 4 |
| 3 | 6 |
| 4 | 10 |
| 5 | 18 |
| 6 | 28 |
| 7 | 46 |
| 8 | 76 |
| 9 | 122 |
| 10 | 198 |
| 11 | 322 |
| 12 | 520 |
| 13 | 842 |
| 14 | 1364 |
| 15 | 2206 |
| 16 | 3570 |
| 17 | 5778 |
| 18 | 9348 |
| 19 | 15126 |
| 20 | 24476 |
| 21 | 39602 |
| 22 | 64078 |
| 23 | 103682 |
| 24 | 167760 |
| 25 | 271442 |
| 26 | 439204 |
| 27 | 710646 |
| 28 | 1149850 |
| 29 | 1860498 |
| 30 | 3010348 |
| 31 | 4870846 |
| 32 | 7881196 |
| 33 | 12752042 |
| 34 | 20633238 |
| 35 | 33385282 |
| 36 | 54018520 |
| 37 | 87403802 |
| 38 | 141422324 |
| 39 | 228826126 |
[2,4,6,10,18,28,46,76,122,198,322,520,842,1364, 2206,3570,5778,9348,15126,24476,39602,64078, 103682,167760,271442,439204,710646,1149850, 1860498,3010348,4870846,7881196,12752042,20633238, 33385282,54018520,87403802,141422324,228826126] |