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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 2 |
| 7 | 6 |
| 8 | 14 |
| 9 | 26 |
| 10 | 49 |
| 11 | 99 |
| 12 | 197 |
| 13 | 391 |
| 14 | 782 |
| 15 | 1564 |
| 16 | 3123 |
| 17 | 6244 |
| 18 | 12490 |
| 19 | 24970 |
| 20 | 49940 |
| 21 | 99880 |
| 22 | 199738 |
| 23 | 399472 |
| 24 | 798940 |
| 25 | 1597844 |
| 26 | 3195684 |
| 27 | 6391368 |
| 28 | 12782668 |
| 29 | 25565336 |
| 30 | 51130664 |
| 31 | 102261174 |
| 32 | 204522354 |
| 33 | 409044702 |
| 34 | 818089110 |
| 35 | 1636178220 |
[1,1,1,1,1,1,2,6,14,26,49,99,197,391,782,1564, 3123,6244,12490,24970,49940,99880,199738,399472, 798940,1597844,3195684,6391368,12782668,25565336, 51130664,102261174,204522354,409044702,818089110, 1636178220] |