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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 4 |
| 5 | 7 |
| 6 | 13 |
| 7 | 20 |
| 8 | 32 |
| 9 | 51 |
| 10 | 83 |
| 11 | 130 |
| 12 | 206 |
| 13 | 320 |
| 14 | 496 |
| 15 | 759 |
| 16 | 1171 |
| 17 | 1786 |
| 18 | 2714 |
| 19 | 4104 |
| 20 | 6193 |
| 21 | 9286 |
| 22 | 13920 |
| 23 | 20737 |
| 24 | 30865 |
| 25 | 45721 |
| 26 | 67632 |
| 27 | 99683 |
| 28 | 146604 |
| 29 | 214865 |
| 30 | 314782 |
| 31 | 459136 |
| 32 | 668867 |
| 33 | 972425 |
| 34 | 1410458 |
| 35 | 2040894 |
| 36 | 2950839 |
| 37 | 4253713 |
| 38 | 6123836 |
| 39 | 8801349 |
| 40 | 12627079 |
[1,1,1,3,4,7,13,20,32,51,83,130,206,320,496,759, 1171,1786,2714,4104,6193,9286,13920,20737,30865, 45721,67632,99683,146604,214865,314782,459136, 668867,972425,1410458,2040894,2950839,4253713, 6123836,8801349,12627079] |