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| n | a(n) |
|---|---|
| 1 | 11 |
| 2 | 33 |
| 3 | 202 |
| 4 | 846 |
| 5 | 3035 |
| 6 | 17075 |
| 7 | 65790 |
| 8 | 283052 |
| 9 | 1383887 |
| 10 | 5430572 |
| 11 | 24942550 |
| 12 | 111942189 |
| 13 | 462444973 |
| 14 | 2123240962 |
| 15 | 9194726059 |
| 16 | 39505113112 |
| 17 | 178049613558 |
| 18 | 765870935841 |
| 19 | 3356043819951 |
| 20 | 14873017976807 |
| 21 | 64294462854133 |
[11,33,202,846,3035,17075,65790,283052,1383887, 5430572,24942550,111942189,462444973,2123240962, 9194726059,39505113112,178049613558,765870935841, 3356043819951,14873017976807,64294462854133] |