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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 4 |
| 3 | 8 |
| 4 | 17 |
| 5 | 28 |
| 6 | 52 |
| 7 | 83 |
| 8 | 142 |
| 9 | 232 |
| 10 | 377 |
| 11 | 614 |
| 12 | 996 |
| 13 | 1641 |
| 14 | 2642 |
| 15 | 4290 |
| 16 | 6945 |
| 17 | 11246 |
| 18 | 18198 |
| 19 | 29457 |
| 20 | 47662 |
| 21 | 77124 |
| 22 | 124797 |
| 23 | 201928 |
| 24 | 326736 |
| 25 | 528723 |
| 26 | 855464 |
| 27 | 1384230 |
| 28 | 2239797 |
| 29 | 3624050 |
| 30 | 5863850 |
| 31 | 9487911 |
| 32 | 15351768 |
| 33 | 24839684 |
| 34 | 40191555 |
| 35 | 65031270 |
| 36 | 105222856 |
| 37 | 170254137 |
| 38 | 275477064 |
| 39 | 445731218 |
| 40 | 721208325 |
| 41 | 1166939604 |
[0,1,4,8,17,28,52,83,142,232,377,614,996,1641, 2642,4290,6945,11246,18198,29457,47662,77124, 124797,201928,326736,528723,855464,1384230, 2239797,3624050,5863850,9487911,15351768,24839684, 40191555,65031270,105222856,170254137,275477064, 445731218,721208325,1166939604] |