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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 6 |
| 3 | 17 |
| 4 | 38 |
| 5 | 75 |
| 6 | 138 |
| 7 | 243 |
| 8 | 416 |
| 9 | 699 |
| 10 | 1160 |
| 11 | 1909 |
| 12 | 3124 |
| 13 | 5093 |
| 14 | 8282 |
| 15 | 13445 |
| 16 | 21802 |
| 17 | 35327 |
| 18 | 57214 |
| 19 | 92631 |
| 20 | 149940 |
| 21 | 242671 |
| 22 | 392716 |
| 23 | 635497 |
| 24 | 1028328 |
| 25 | 1663945 |
| 26 | 2692398 |
| 27 | 4356473 |
| 28 | 7049006 |
| 29 | 11405619 |
| 30 | 18454770 |
| 31 | 29860539 |
| 32 | 48315464 |
| 33 | 78176163 |
[0,1,6,17,38,75,138,243,416,699,1160,1909,3124, 5093,8282,13445,21802,35327,57214,92631,149940, 242671,392716,635497,1028328,1663945,2692398, 4356473,7049006,11405619,18454770,29860539, 48315464,78176163] |