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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 6 |
| 4 | 11 |
| 5 | 22 |
| 6 | 40 |
| 7 | 72 |
| 8 | 123 |
| 9 | 215 |
| 10 | 363 |
| 11 | 605 |
| 12 | 991 |
| 13 | 1618 |
| 14 | 2598 |
| 15 | 4139 |
| 16 | 6537 |
| 17 | 10229 |
| 18 | 15871 |
| 19 | 24476 |
| 20 | 37487 |
| 21 | 56995 |
| 22 | 86177 |
| 23 | 129531 |
| 24 | 193662 |
| 25 | 287992 |
| 26 | 426254 |
| 27 | 627841 |
| 28 | 920708 |
| 29 | 1344331 |
| 30 | 1954987 |
| 31 | 2831688 |
| 32 | 4086168 |
| 33 | 5875087 |
| 34 | 8417724 |
| 35 | 12020250 |
| 36 | 17108958 |
| 37 | 24275947 |
| 38 | 34340966 |
[1,1,3,6,11,22,40,72,123,215,363,605,991,1618, 2598,4139,6537,10229,15871,24476,37487,56995, 86177,129531,193662,287992,426254,627841,920708, 1344331,1954987,2831688,4086168,5875087,8417724, 12020250,17108958,24275947,34340966] |