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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 2 |
| 6 | 5 |
| 7 | 13 |
| 8 | 29 |
| 9 | 65 |
| 10 | 143 |
| 11 | 307 |
| 12 | 652 |
| 13 | 1369 |
| 14 | 2846 |
| 15 | 5870 |
| 16 | 12022 |
| 17 | 24470 |
| 18 | 49538 |
| 19 | 99802 |
| 20 | 200195 |
| 21 | 400004 |
| 22 | 796395 |
| 23 | 1580451 |
| 24 | 3127083 |
| 25 | 6170303 |
| 26 | 12144313 |
| 27 | 23846197 |
| 28 | 46721478 |
| 29 | 91354371 |
| 30 | 178285068 |
| 31 | 347316524 |
| 32 | 675472732 |
| 33 | 1311610492 |
| 34 | 2543054356 |
| 35 | 4923747716 |
[0,0,0,1,2,5,13,29,65,143,307,652,1369,2846,5870, 12022,24470,49538,99802,200195,400004,796395, 1580451,3127083,6170303,12144313,23846197, 46721478,91354371,178285068,347316524,675472732, 1311610492,2543054356,4923747716] |