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| n | a(n) |
|---|---|
| 0 | 3 |
| 1 | 0 |
| 2 | 2 |
| 3 | 6 |
| 4 | 2 |
| 5 | 10 |
| 6 | 14 |
| 7 | 14 |
| 8 | 34 |
| 9 | 42 |
| 10 | 62 |
| 11 | 110 |
| 12 | 146 |
| 13 | 234 |
| 14 | 366 |
| 15 | 526 |
| 16 | 834 |
| 17 | 1258 |
| 18 | 1886 |
| 19 | 2926 |
| 20 | 4402 |
| 21 | 6698 |
| 22 | 10254 |
| 23 | 15502 |
| 24 | 23650 |
| 25 | 36010 |
| 26 | 54654 |
| 27 | 83310 |
| 28 | 126674 |
| 29 | 192618 |
| 30 | 293294 |
| 31 | 445966 |
| 32 | 678530 |
| 33 | 1032554 |
| 34 | 1570462 |
| 35 | 2389614 |
| 36 | 3635570 |
| 37 | 5530538 |
| 38 | 8414798 |
| 39 | 12801678 |
| 40 | 19475874 |
[3,0,2,6,2,10,14,14,34,42,62,110,146,234,366,526, 834,1258,1886,2926,4402,6698,10254,15502,23650, 36010,54654,83310,126674,192618,293294,445966, 678530,1032554,1570462,2389614,3635570,5530538, 8414798,12801678,19475874] |