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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 6 |
| 3 | 14 |
| 4 | 32 |
| 5 | 68 |
| 6 | 140 |
| 7 | 280 |
| 8 | 544 |
| 9 | 1034 |
| 10 | 1930 |
| 11 | 3544 |
| 12 | 6416 |
| 13 | 11472 |
| 14 | 20288 |
| 15 | 35532 |
| 16 | 61696 |
| 17 | 106304 |
| 18 | 181906 |
| 19 | 309362 |
| 20 | 523228 |
| 21 | 880576 |
| 22 | 1475424 |
| 23 | 2462302 |
| 24 | 4094682 |
| 25 | 6787588 |
| 26 | 11219504 |
| 27 | 18498094 |
| 28 | 30429502 |
| 29 | 49955706 |
| 30 | 81864400 |
| 31 | 133940690 |
| 32 | 218834842 |
| 33 | 357090226 |
| 34 | 582050680 |
[1,2,6,14,32,68,140,280,544,1034,1930,3544,6416, 11472,20288,35532,61696,106304,181906,309362, 523228,880576,1475424,2462302,4094682,6787588, 11219504,18498094,30429502,49955706,81864400, 133940690,218834842,357090226,582050680] |