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| n | a(n) |
|---|---|
| 0 | 3 |
| 1 | 0 |
| 2 | 2 |
| 3 | 8 |
| 4 | 10 |
| 5 | 22 |
| 6 | 48 |
| 7 | 90 |
| 8 | 182 |
| 9 | 368 |
| 10 | 730 |
| 11 | 1462 |
| 12 | 2928 |
| 13 | 5850 |
| 14 | 11702 |
| 15 | 23408 |
| 16 | 46810 |
| 17 | 93622 |
| 18 | 187248 |
| 19 | 374490 |
| 20 | 748982 |
| 21 | 1497968 |
| 22 | 2995930 |
| 23 | 5991862 |
| 24 | 11983728 |
| 25 | 23967450 |
| 26 | 47934902 |
| 27 | 95869808 |
| 28 | 191739610 |
| 29 | 383479222 |
| 30 | 766958448 |
| 31 | 1533916890 |
| 32 | 3067833782 |
| 33 | 6135667568 |
| 34 | 12271335130 |
[3,0,2,8,10,22,48,90,182,368,730,1462,2928,5850, 11702,23408,46810,93622,187248,374490,748982, 1497968,2995930,5991862,11983728,23967450, 47934902,95869808,191739610,383479222,766958448, 1533916890,3067833782,6135667568,12271335130] |