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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 2 |
| 6 | 4 |
| 7 | 8 |
| 8 | 19 |
| 9 | 38 |
| 10 | 76 |
| 11 | 152 |
| 12 | 315 |
| 13 | 630 |
| 14 | 1260 |
| 15 | 2520 |
| 16 | 5083 |
| 17 | 10166 |
| 18 | 20332 |
| 19 | 40664 |
| 20 | 81499 |
| 21 | 162998 |
| 22 | 325996 |
| 23 | 651992 |
| 24 | 1304667 |
| 25 | 2609334 |
| 26 | 5218668 |
| 27 | 10437336 |
| 28 | 20877403 |
| 29 | 41754806 |
| 30 | 83509612 |
| 31 | 167019224 |
| 32 | 334049371 |
| 33 | 668098742 |
| 34 | 1336197484 |
| 35 | 2672394968 |
[0,0,0,0,1,2,4,8,19,38,76,152,315,630,1260,2520, 5083,10166,20332,40664,81499,162998,325996,651992, 1304667,2609334,5218668,10437336,20877403, 41754806,83509612,167019224,334049371,668098742, 1336197484,2672394968] |