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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 8 |
| 3 | 19 |
| 4 | 42 |
| 5 | 89 |
| 6 | 183 |
| 7 | 368 |
| 8 | 728 |
| 9 | 1422 |
| 10 | 2750 |
| 11 | 5276 |
| 12 | 10057 |
| 13 | 19069 |
| 14 | 35998 |
| 15 | 67707 |
| 16 | 126954 |
| 17 | 237423 |
| 18 | 443029 |
| 19 | 825116 |
| 20 | 1534224 |
| 21 | 2848736 |
| 22 | 5283100 |
| 23 | 9787452 |
| 24 | 18115705 |
| 25 | 33504067 |
| 26 | 61921452 |
| 27 | 114373263 |
| 28 | 211145050 |
| 29 | 389618073 |
| 30 | 718660963 |
| 31 | 1325126972 |
| 32 | 2442633472 |
| 33 | 4501351758 |
[1,3,8,19,42,89,183,368,728,1422,2750,5276,10057, 19069,35998,67707,126954,237423,443029,825116, 1534224,2848736,5283100,9787452,18115705,33504067, 61921452,114373263,211145050,389618073,718660963, 1325126972,2442633472,4501351758] |