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| n | a(n) |
|---|---|
| 9 | 1 |
| 10 | 7 |
| 11 | 27 |
| 12 | 82 |
| 13 | 221 |
| 14 | 553 |
| 15 | 1323 |
| 16 | 3078 |
| 17 | 7019 |
| 18 | 15765 |
| 19 | 34992 |
| 20 | 76922 |
| 21 | 167697 |
| 22 | 363020 |
| 23 | 780937 |
| 24 | 1670786 |
| 25 | 3557060 |
| 26 | 7539856 |
| 27 | 15918972 |
| 28 | 33490067 |
| 29 | 70226358 |
| 30 | 146822144 |
| 31 | 306121101 |
| 32 | 636648253 |
| 33 | 1320964417 |
| 34 | 2734901341 |
| 35 | 5650875038 |
| 36 | 11653922283 |
| 37 | 23991828701 |
| 38 | 49310264440 |
[1,7,27,82,221,553,1323,3078,7019,15765,34992, 76922,167697,363020,780937,1670786,3557060, 7539856,15918972,33490067,70226358,146822144, 306121101,636648253,1320964417,2734901341, 5650875038,11653922283,23991828701,49310264440] |