| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 6 |
| 4 | 14 |
| 5 | 26 |
| 6 | 55 |
| 7 | 99 |
| 8 | 192 |
| 9 | 340 |
| 10 | 619 |
| 11 | 1063 |
| 12 | 1873 |
| 13 | 3129 |
| 14 | 5308 |
| 15 | 8718 |
| 16 | 14385 |
| 17 | 23116 |
| 18 | 37346 |
| 19 | 58949 |
| 20 | 93294 |
| 21 | 145131 |
| 22 | 225623 |
| 23 | 345833 |
| 24 | 529976 |
| 25 | 801675 |
| 26 | 1211225 |
| 27 | 1811558 |
| 28 | 2703327 |
| 29 | 3998289 |
| 30 | 5901849 |
| 31 | 8641160 |
| 32 | 12623450 |
| 33 | 18315370 |
| 34 | 26503133 |
| 35 | 38119289 |
| 36 | 54691750 |
| 37 | 78028166 |
| 38 | 111041918 |
| 39 | 157250528 |
| 40 | 222105633 |
[1,1,3,6,14,26,55,99,192,340,619,1063,1873,3129, 5308,8718,14385,23116,37346,58949,93294,145131, 225623,345833,529976,801675,1211225,1811558, 2703327,3998289,5901849,8641160,12623450,18315370, 26503133,38119289,54691750,78028166,111041918, 157250528,222105633] |