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| n | a(n) |
|---|---|
| 4 | 1 |
| 5 | 1 |
| 6 | 4 |
| 7 | 11 |
| 8 | 35 |
| 9 | 97 |
| 10 | 282 |
| 11 | 792 |
| 12 | 2243 |
| 13 | 6275 |
| 14 | 17602 |
| 15 | 49206 |
| 16 | 137713 |
| 17 | 385208 |
| 18 | 1078667 |
| 19 | 3022342 |
| 20 | 8478199 |
| 21 | 23807190 |
| 22 | 66932592 |
| 23 | 188394855 |
| 24 | 530911452 |
| 25 | 1497892857 |
| 26 | 4230987944 |
| 27 | 11964356354 |
| 28 | 33869704270 |
| 29 | 95982410945 |
| 30 | 272279600817 |
| 31 | 773153124315 |
| 32 | 2197492308752 |
[1,1,4,11,35,97,282,792,2243,6275,17602,49206, 137713,385208,1078667,3022342,8478199,23807190, 66932592,188394855,530911452,1497892857, 4230987944,11964356354,33869704270,95982410945, 272279600817,773153124315,2197492308752] |