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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 6 |
| 5 | 10 |
| 6 | 22 |
| 7 | 38 |
| 8 | 82 |
| 9 | 142 |
| 10 | 306 |
| 11 | 530 |
| 12 | 1142 |
| 13 | 1978 |
| 14 | 4262 |
| 15 | 7382 |
| 16 | 15906 |
| 17 | 27550 |
| 18 | 59362 |
| 19 | 102818 |
| 20 | 221542 |
| 21 | 383722 |
| 22 | 826806 |
| 23 | 1432070 |
| 24 | 3085682 |
| 25 | 5344558 |
| 26 | 11515922 |
| 27 | 19946162 |
| 28 | 42978006 |
| 29 | 74440090 |
| 30 | 160396102 |
| 31 | 277814198 |
| 32 | 598606402 |
| 33 | 1036816702 |
| 34 | 2234029506 |
| 35 | 3869452610 |
[1,1,1,3,6,10,22,38,82,142,306,530,1142,1978,4262, 7382,15906,27550,59362,102818,221542,383722, 826806,1432070,3085682,5344558,11515922,19946162, 42978006,74440090,160396102,277814198,598606402, 1036816702,2234029506,3869452610] |