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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 6 |
| 6 | 10 |
| 7 | 19 |
| 8 | 33 |
| 9 | 62 |
| 10 | 110 |
| 11 | 204 |
| 12 | 366 |
| 13 | 675 |
| 14 | 1219 |
| 15 | 2239 |
| 16 | 4059 |
| 17 | 7439 |
| 18 | 13518 |
| 19 | 24737 |
| 20 | 45018 |
| 21 | 82304 |
| 22 | 149924 |
| 23 | 273929 |
| 24 | 499290 |
| 25 | 911902 |
| 26 | 1662787 |
| 27 | 3036105 |
| 28 | 5537577 |
| 29 | 10109364 |
| 30 | 18441799 |
| 31 | 33663239 |
| 32 | 61416729 |
| 33 | 112099746 |
| 34 | 204536183 |
| 35 | 373305550 |
| 36 | 681166986 |
| 37 | 1243173492 |
| 38 | 2268490929 |
| 39 | 4140035734 |
| 40 | 7554756990 |
| 41 | 13787320832 |
| 42 | 25159612832 |
| 43 | 45915363672 |
[1,1,2,3,6,10,19,33,62,110,204,366,675,1219,2239, 4059,7439,13518,24737,45018,82304,149924,273929, 499290,911902,1662787,3036105,5537577,10109364, 18441799,33663239,61416729,112099746,204536183, 373305550,681166986,1243173492,2268490929, 4140035734,7554756990,13787320832,25159612832, 45915363672] |