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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 6 |
| 6 | 10 |
| 7 | 20 |
| 8 | 31 |
| 9 | 65 |
| 10 | 101 |
| 11 | 216 |
| 12 | 336 |
| 13 | 728 |
| 14 | 1128 |
| 15 | 2472 |
| 16 | 3823 |
| 17 | 8451 |
| 18 | 13051 |
| 19 | 29050 |
| 20 | 44803 |
| 21 | 100298 |
| 22 | 154518 |
| 23 | 347568 |
| 24 | 534964 |
| 25 | 1208220 |
| 26 | 1858156 |
| 27 | 4211312 |
| 28 | 6472168 |
| 29 | 14712960 |
| 30 | 22597760 |
| 31 | 51507280 |
| 32 | 79067375 |
| 33 | 180642391 |
| 34 | 277164295 |
| 35 | 634551606 |
| 36 | 973184313 |
| 37 | 2232223626 |
| 38 | 3422117190 |
| 39 | 7862669700 |
| 40 | 12049586631 |
[1,1,2,3,6,10,20,31,65,101,216,336,728,1128,2472, 3823,8451,13051,29050,44803,100298,154518,347568, 534964,1208220,1858156,4211312,6472168,14712960, 22597760,51507280,79067375,180642391,277164295, 634551606,973184313,2232223626,3422117190, 7862669700,12049586631] |