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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 6 |
| 6 | 19 |
| 7 | 61 |
| 8 | 197 |
| 9 | 637 |
| 10 | 2060 |
| 11 | 6662 |
| 12 | 21545 |
| 13 | 69677 |
| 14 | 225337 |
| 15 | 728745 |
| 16 | 2356778 |
| 17 | 7621874 |
| 18 | 24649315 |
| 19 | 79716449 |
| 20 | 257804821 |
| 21 | 833746693 |
| 22 | 2696355892 |
| 23 | 8720076682 |
| 24 | 28200927617 |
| 25 | 91202445513 |
| 26 | 294950796673 |
| 27 | 953877628705 |
| 28 | 3084862088210 |
| 29 | 9976514614558 |
| 30 | 32264276654339 |
| 31 | 104343409321397 |
| 32 | 337448974463477 |
| 33 | 1091317708583837 |
| 34 | 3529346452933372 |
| 35 | 11413987225587534 |
[1,1,1,2,6,19,61,197,637,2060,6662,21545,69677, 225337,728745,2356778,7621874,24649315,79716449, 257804821,833746693,2696355892,8720076682, 28200927617,91202445513,294950796673,953877628705, 3084862088210,9976514614558,32264276654339, 104343409321397,337448974463477,1091317708583837, 3529346452933372,11413987225587534] |