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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 5 |
| 3 | 16 |
| 4 | 49 |
| 5 | 130 |
| 6 | 332 |
| 7 | 792 |
| 8 | 1825 |
| 9 | 4049 |
| 10 | 8726 |
| 11 | 18320 |
| 12 | 37620 |
| 13 | 75682 |
| 14 | 149564 |
| 15 | 290788 |
| 16 | 557017 |
| 17 | 1052590 |
| 18 | 1964353 |
| 19 | 3623568 |
| 20 | 6612698 |
| 21 | 11946904 |
| 22 | 21381720 |
| 23 | 37930772 |
| 24 | 66730680 |
| 25 | 116478135 |
| 26 | 201805078 |
| 27 | 347179864 |
| 28 | 593284716 |
| 29 | 1007389494 |
| 30 | 1700141724 |
| 31 | 2852620740 |
| 32 | 4759740593 |
| 33 | 7899577736 |
| 34 | 13043665078 |
[0,1,5,16,49,130,332,792,1825,4049,8726,18320, 37620,75682,149564,290788,557017,1052590,1964353, 3623568,6612698,11946904,21381720,37930772, 66730680,116478135,201805078,347179864,593284716, 1007389494,1700141724,2852620740,4759740593, 7899577736,13043665078] |